I need the input voltage for ac adapter for my GE 98903 2.1 Pro Speaker System

What system does it have ? Base or up level ,does it have a amp ? Do you know what a RPO code is ? Without testing no one could say for sure what the issue is . First off would need to know what system we are dealing with .
RPO Options
The entertainment system on this vehicle is configured with either a base or uplevel audio system. Both the base and uplevel audio systems contain a radio, antenna, and speakers.
The following shows the Enteratinment RPOs that are available for this vehicle:
• (UM7) AM/FM Stereo
• (U1C) AM/FM Stereo CD
• (US8) AM/FM Stereo, CD, MP3, RDS, EQ
• (US9) AM/FM Stereo, 6-Disc CD, MP3, RDS, EQ
• (UXQ4) Base Four Speaker
• (U79) Uplevel Four Speaker
• (WBM) Premium Audio
• (U2K) Digital Radio

Circuit Operation
Radio Power: The main radio power is supplied by the 10A RADIO (BATT1) fuse in the body control module (BCM). Radio switch-on power, 12 volts in ACC, RUN or RAP, is supplied by the 10A RADIO (ACC.) in the BCM.
Radio Grounds: The main radio ground provides a ground for the radio circuits. An additional braided ground strap provides a shielding radio case ground to reduce EMI noise. Both grounds are connected together inside the radio.
Radio Speaker Outputs: At zero volume, the plus (+) and minus (-) speaker outputs are both approximately 5-6 volts, measured to vehicle ground. If a plus or minus for any speaker output is shorted to ground or voltage, the radio circuitry will turn OFF all 4 speaker outputs for component protection. Above zero volume, the plus and minus change to create a voltage difference between each other, to drive the voice coil of the speaker.
Radio Park Lamp Input: The radio park lamp input allows the radio to sense when the vehicle parking lamps are ON. When the parking lamps are ON, this circuit goes to battery voltage, and the radio display back-lighting switches from full bright to the brightness level determined by the I/P illumination input.
Radio I/P Illumination Input: A pulse width modulated (PWM) voltage for instrument panel (I/P) illumination is provided to the radio I/P illumination input. The Radio uses this input to directly illuminate the radio buttons and adjust the radio display back-lighting when the park lamp input is ON.
Amplifier Power: The main amplifier power is provided by the 20A PREM AUDIO fuse in the instrument panel fuse block..
Amplifier Radio Speaker Inputs (WBM only): The radio speaker outputs, at a reduced output level for amplified systems, are the amplifier inputs. The amplifier boosts these inputs and outputs them to the vehicle speakers. Speaker plus and minus circuits from the radio change to create a voltage difference between each other. If one speaker plus or minus is open between the radio and the amplifier, the input to the amplifier is approximately half because only one of the circuits is changing. The speaker for that channel then operates at approximately only half the normal volume.
Amplifier Speaker Outputs (WBM only): At zero volume, the plus (+) and minus (-) speaker outputs are both approximately 5-6 volts, measured to vehicle ground. If a plus or minus for any speaker output is shorted to ground or voltage, the amplifier circuitry will turn OFF either the front outputs or rear outputs for component protection. Above zero volume, the plus and minus change to create a voltage difference between each other, to drive the voice coil of the speaker.
Amplifier Radio-On (WBM only): When the radio is ON, this circuit is pulled to 12 volts by the radio. The amplifier switches ON when this circuit is 12 volts and switches OFF when this signal is 0 volts.
Remote Radio Audio Signal Inputs (UE1 only): Audio output from the OnStar® communications module connects to the remote audio signal inputs of the radio. When the cellular telephone mute signal goes to 0 volts, the radio over-rides any other audio signal and uses these inputs as the source for output to the speakers.
Cellular Telephone Mute (UE1 only): The OnStar® communications module uses the cellular telephone mute signal circuit to over-ride the radio for OnStar® communication. When cellular telephone mute is not active, this circuit is held at 2 volts by the radio. When the cellular telephone mute signal is pulled to ground, the radio over-rides any other audio signal and uses the remote audio signals as the source for output to the speakers. If the radio was OFF when this circuit is pulled low, the radio will turn ON. Additionally, the radio fades the speakers to full front, adjusts the volume to an initial audible level, and sets an AutoTone designed for optimal use with OnStar®. When the mute signal is no longer pulled to ground, the radio returns to the mode it was in previously.

Hooking up a professional or factory scan tool that can read radio codes would be one of the first test's to do .
DTC B1025, B1035, B1045, or B1055 (w/out RPO WBM)
DTC B1025, B1035, B1045, or B1055 (w/ RPO WBM)
DTC B1030, B1040, B1050, or B1060 (w/ out RPO WBM)
DTC B1030, B1040, B1050, or B1060 (w/ RPO WBM)
DTC B1259
The following conditions are present for 250 ms or longer:
B1025 - B1055 01
One of the speaker positive output circuits is shorted to battery.
B1025 - B1055 02
The speaker positive output circuit is shorted to ground.
B1025 - B1055 04
The speaker positive output circuit is open.

Your best bet , take it to a qualified repair shop .

This a battery jump pack that is used to jump start a car. Some units have an ac adapter built in so you can charge the battery in the jump start pack. My unit has a spot to connect the ac adapter to the jump pack so you can charge the battery in the jump pack. My ac adapter has been lost. I know I have to buy a new ac adapter so I can charge my jump pack, what I do not know is if the input (from the ac adapter) is 120v 60 hz
I understand that the DC output needs to dc12v. I do not understand the milliamps. The battery in the jump box is 12v 10 ah ( what ever that is). I just want a new ac adapter to charge the jump pack with that is not going to damage anything.

Speakers get power from the amp if your system has one or from the radio , if the tweeters work it's not a fuse problem . You like listen to your stereo loud . Blew a channel in the radio or amp ?
Take it and have it checked for DTC'S - diagnostic trouble codes
DTC B1025 01: Audio Output 1 Left Front Circuit Short to Battery
DTC B1025 02: Audio Output 1 Left Front Circuit Short to Ground
DTC B1035 01: Audio Output 2 Right Front Circuit Short to Battery
DTC B1035 02: Audio Output 2 Right Front Circuit Short to Ground
DTC B1045 01: Audio Output 3 Left Rear Circuit Short to Battery
DTC B1045 02: Audio Output 3 Left Rear Circuit Short to Ground
DTC B1055 01: Audio Output 4 Right Rear Circuit Short to Battery
DTC B1055 02: Audio Output 4 Right Rear Circuit Short to Ground

Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier (if equipped) have a DC bias voltage that is one half of the battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5 V DC. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound. This voltage will vary depending on what type of audio is being listened to, talk or music, and type of music, as well as the volume setting of the system. Low volume and talk settings will measure around 1V AC and less, where constant music may measure 3 V AC and slightly higher.
Do you know how to do DC voltage testing ?
Without Amplifier without UK6
Ignition OFF, disconnect the harness connector at the appropriate speaker.
Radio ON, test for 5.0-7.5 V between the signal circuit terminal A and ground.
? If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
? If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
Test for 5.0-7.5 V between the signal circuit terminal B and ground.
? If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
? If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
If all circuits test normal, replace the speaker.

If you are getting 6v at your speakers, you have serious problems with your deck. Also, speakers don't share the common ground (chassis) with the vehicle. They need to be directly wired to the deck, which means you shouldn't test the output of the speaker wires using the chassis as a ground point. If you did this you may have already damaged the deck.

OBDII DTC

P1001 Key on engine running unable to complete; key on engine running aborted

P1100 Mass air flow sensor intermittent

P1101 Mass air flow sensor out of self test range

P1104 Mass Airflow (MAF) Sensor Ground Circuit Malfunction

P1107 Left MAP Sensor Circuit

P1108 Right MAP Sensor Circuit

P1112 IATS Circuit High Voltage

P1113 IATS Circuit Low Voltage

P1121 Pedal Position Sensor Circuit A Range/Performance

P1122 Pedal Position Sensor Circuit A Low Voltage

P1123 Pedal Position Sensor Circuit A High Voltage

P1137 No Rear HO2S Response

P1138 No Rear HO3S Response

P1157 No Rear HO2S Response

P1158 No Rear HO3S Response

P1171 All Cylinders Too Lean

P1172 All Cylinders Too Rich

P1176 Adaptive Fuel Metering Trim Too Lean

P1177 Adaptive Fuel Metering Trim Too Rich

P1178 Adaptive Fuel Metering Trim Too Lean

P1179 Adaptive Fuel Metering Trim Too Rich

P1187 Both Front HO2S Heater Circuits (High Resistance)

P1188 Both Front HO2S Heater Circuits (Open Short to Ground High Resistance)

P1190 Both Front HO2S Heater Circuits (High Battery Voltage Short to Voltage)

P1193 Both Front HO2S Heater Circuits (High Resistance MAF Sensor Fault)

P1194 Both Front HO2S Heater Circuits (Open Short to Ground High Resistance)

P1196 Both Front HO2S Heater Circuits (High Battery Voltage Short to Ground)

P1198 Fuel Level Sensor (High Voltage)

P1199 Fuel Level Sensor (Low Voltage)

P1201 No. 1 Fuel Injector

P1202 No. 2 Fuel Injector

P1203 No. 3 Fuel Injector

P1204 No. 4 Fuel Injector

P1205 No. 5 Fuel Injector

P1206 No. 6 Fuel Injector

P1221 Pedal Position Sensor Circuit B Range/Performance

P1222 Pedal Position Sensor Circuit B Low Voltage

P1223 Pedal Position Sensor Circuit B High Voltage

P1224 Electronic Throttle Control Position Error

P1226 Mechanical Guard Circuit Range Performance

P1227 Mechanical Guard Circuit Low Input

P1228 Mechanical Guard Circuit High Input

P1229 Throttle Control Circuit Malfunction

P1230 Fuel Pump Relay Malfunction

P1235 VSV 1 Circuit Range/Performance

P1236 VSV 1 Vacuum Circuit Failure

P1237 VSV 2 Atmosphere Circuit Failure

P1238 VSV 3 Release Circuit Failure

P1240 Throttle Position Sensor Voltage Malfunction//Sensor Reference Voltage Low (Throttle

Fuel Tank Pressure)

P1241 Throttle Position Sensor Voltage Low Input//Reference Voltage Low (Throttle Fuel

Tank Pressure)

P1242 Throttle Position Sensor Voltage High Input

P1243 Throttle Position Sensor Ground Malfunction

P1245 Crank Signal Low Input

P1246 Crank Signal High Input

P1313 Misfire Catalyst Damage Bank No. 1

P1314 Misfire Catalyst Damage Bank No. 2

P1315 Misfire Excess Emissions

P1316 Misfire Rate Above Limit

P1335 Crankshaft Position Sensor Circuit

P1336 Camshaft Position Sensor (CMP) Circuit Performance

P1361 Ignition Coil Primary Circuit (Cylinder No. 1)

P1362 Ignition Coil Primary Circuit (Cylinder No. 2)

P1363 Ignition Coil Primary Circuit (Cylinder No. 3)

P1364 Ignition Coil Primary Circuit (Cylinder No. 4)

P1365 Ignition Coil Primary Circuit (Cylinder No. 5)

P1366 Ignition Coil Primary Circuit (Cylinder No. 6)

P1367 Ignition Monitor (Bank A)//Ignition System Failure Group 1

P1368 Ignition Monitor (Bank B)//Ignition System Failure Group 2

P1371 Early Activation Ignition Coil (Cylinder No. 1)

P1372 Early Activation Ignition Coil (Cylinder No. 2)

P1373 Early Activation Ignition Coil (Cylinder No. 3)

P1374 Early Activation Ignition Coil (Cylinder No. 4)

P1375 Early Activation Ignition Coil (Cylinder No. 5)

P1376 Early Activation Ignition Coil (Cylinder No. 6)

P1392 Variable Valve Timing Solenoid A Low Input

P1393 Variable Valve Timing Solenoid A High Input

P1396 Variable Valve Timing Solenoid B Malfunction

P1397 Variable Valve Timing Solenoid B Low Input

P1398 Variable Valve Timing Solenoid B High Input

P1400 EGR Valve Position Circuit (Valve Sticking Open or Short)

P1401 EGR Valve Position Circuit (Open Short to Ground)

P1408 EGR Temperature Sensor Circuit

P1409 EGR Valve Circuit

P1440 EVAP Purge Valve Open

P1441 EVAP Valve Circuit

P1443 EVAP Valve Circuit

P1447 EVAP Valve Circuit

P1448 EVAP Valve Circuit

P1454 EVAP System

P1474 Charge Air Coolant Pump Relay

P1475 Radiator Fans Slow Malfunction

P1476 Radiator Fans Fast Parallel Circuit Malfunction

P1506 Idle Speed Control Circuit (Low RPM; Bank B)

P1507 Idle Speed Control Circuit (High RPM; Bank B)

P1508 Idle Speed Control Circuit

P1509 Idle Speed Control Circuit

P1512 Throttle Position Sensor Idle Switch Sense Circuit

P1513 Throttle Position Sensor Idle Switch Sense Circuit

P1514 Park/Neutral Position Switch High Load Neutral/Drive

P1516 Gear Change Park/Neutral Malfunction

P1517 Engine Cranking Park/Neutral Malfunction

P1607 MIL Output Circuit

P1608 Automatic Transmission

P1609 Internal ECM Error

P1641 Fuel Pump Relay No. 1

P1646 Fuel Pump Relay No. 2

P1739 Automatic Transmission

P1775 Transmission Control Module MIL Circuit

P1776 Torque Reduction Request Signal

P1777 Torque Reduction Circuit

P1780 Automatic Transmission

P1781 Automatic Transmission

P1782 Automatic Transmission

P1783 Automatic Transmission

P1785 Automatic Transmission

P1790 Automatic Transmission

P1791 Automatic Transmission

P1792 Automatic Transmission
P1794 Automatic Transmission

This will depend on whether it's a Bose system, or not.
Non-Bose AC/Delco radioFront Speakers are:L. (-) Light GrayL. (+) TanR. (-) Lt. GreenR. (+) Dk. Green
Rear:L. (-)YellowL. (+)BrownR. (-)Lt. BlueR. (+)Dk. Blue
Be sure to test the connections, as you will notice that there are 2 Yellow wires, 2 Brown wires and 2 grey wires behind the factory radio.

GM pairs all the speakers into separate 4-pin plugs for front and rear. If the factory harness is intact, I'd suggest just getting wire harness adapter from any of your local car audio shops, you'll also need a GM mini antenna adapter, if you are hooking up a new stereo.

I think you have a low pressure situation. To prove or disprove, find the pressure switch and short it out (so the system thinks the switch is indicating sufficient pressure). You can have near sufficient pressure ("OK" pressure) and you can have cooling but your system knows if it is low or not.

My AC worked fine, I thought. It cycled on and off very rapidly - I thought this was normal. It is a 'new' vehicle to me. Pressure was 'ok' but not perfect. When I added one can, it made a world of difference. Mine is a 1994, BTW. I am certain some freon had gone from the system.

I don't think the computer controls the AC - but don't know this for a fact. I suggest you have this system checked by a automobile AC pro for best results.

There is my input for you in under 360 seconds. Thank you for allowing me to input for you and thanks for your question @ FixYa.com

You will need a harness adapter for your model truck. This you will want to solder and heat shrink over the solder joints (Dont just twist tem together) then just plug it in to the factory harness.

You will probably need an adapter kit also.

The wiring harness adapter should come with the color codes for the wires corresponding to your trucks speaker and power wires pinouts make sure you correctly connect them to the color codes of the stereo for proper speaker placement and voltages

The primary security system is built into the ignition lock cylinder. As the key rotates a magnet creates a AC voltage signal to the truck body control module indicating a normal start sequence. This input is a learned signal from previous starting sequences. When a new part is added the ignition learns the input. Sorry not much else to the system.

Here is the first half of the codes look till you find the one you have
111 System PASS.
112 ACT sensor circuit grounded.
113 ACT sensor circuit open.
114 ACT sensor is out of Self-Test.
116 ECT sensor is out of Self-Test.
117 ECT sensor circuit grounded.
118 ECT sensor circuit open.
121 TP sensor is out of Self-Test.
122 TP sensor input is less than Self-Test minimum.
123 TP sensor input is greater than Self-Test maximum.
124 TP sensor input voltage is greater than expected.
125 TP sensor input voltage is less than expected.
128 MAP vacuum hose damaged or disconnected.
129 Insufficient MAF input.
136 HEGO sensor circuit indicates system lean (Right HEGO).
137 HEGO sensor circuit indicates system rich (Right HEGO).
139 No HEGO switching (Front Side).
141 Fuel system indicates lean.
144 No HEGO switching (Left Side).
157 MAF sensor circuit open.
158 MAF sensor shorted to power.
159 MAF sensor is out of Self-Test.
167 Insufficient TP input change.
171 Lack of HEGO switching (Rear Side).
172 HEGO sensor circuit indicates lean. (Rear Side).
173 HEGO sensor circuit indicates rich. (Rear Side).
174 Check for diluted engine oil.
175 Lack of HEGO switching (Front Side).
176 HEGO sensor circuit indicates lean. (Front Side).
177 HEGO sensor circuit indicates rich. (Front Side).
178 Check for diluted engine oil.
179 Fuel system at part throttle lean adaptive limit, system rich (Rear Side).
181 Fuel system at part throttle rich adaptive limit, system lean (Rear Side).
182 Fuel system at idle lean adaptive limit, system rich (Rear Side).
183 Fuel system at idle rich adaptive limit, system lean (Rear Side).
184 MAF sensor input voltage is greater than expected, in range.
185 MAF sensor input voltage is less than expected, in range.
186 Closed loop injector pulse width longer than expected.
187 Closed loop injector pulse width shorter than expected.
188 Fuel system at part throttle lean adaptive limit, system rich (Front Side).
189 Fuel system at part throttle rich adaptive limit, system lean (Front Side).
193 Flexible Fuel sensor circuit failure.
211 PIP circuit failure.
212 Loss of tachometer/IDM input.
213 EEC SPOUT circuit open.
214 CID circuit failure.
215 PCM detected coil 1 primary circuit failure.
216 PCM detected coil 2 primary circuit failure.
217 PCM detected coil 3 primary circuit failure.
218 Loss of ignition diagnostic monitor signal-left side.
219 Spark timing defaulted to 10 degrees, spark output circuit open.
221 Spark timing error.
222 Loss of ignition diagnostic monitor signal-right side.
223 Loss of dual plug inhibit control.
224 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
225 Knock not sensed during dynamic response test KOER.
226 Ignition diagnostic monitor signal not received.
232 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
238 PCM detected coil 4 primary circuit failure.
241 Ignition control module to PCM ignition diagnostic monitor pulse width transmission error.
244 Cylinder Identification circuit fault present when cylinder balance test requested.
311 Secondary air injection system inoperative during KOER self-test (bank #1).
312 Secondary air injection system misdirected during KOER self-test.
313 Secondary air injection system not bypassed during KOER self-test.
314 Secondary air injection system inoperative during KOER self-test (bank #2)
326 PFE sensor circuit voltage lower than expected.
327 PFE sensor circuit voltage below Self-Test minimum.
328 Exhaust gas recirculation valve position sensor closed voltage lower than expected.
332 Insufficient EGR flow.
334 Exhaust gas recirculation valve position sensor closed voltage higher than expected.
335 PFE sensor circuit voltage out of Self-Test range.
336 PFE sensor circuit voltage higher than expected.
337 PFE sensor circuit voltage above Self-Test maximum.
338 Engine coolant temperature lower than expected (thermostat test).
339 Engine coolant temperature higher than expected (thermostat test).
341 Octane adjust service pin open.
381 Frequent A/C clutch cycling.
411 Cannot control RPM during KOER low RPM check.
412 Cannot control RPM during KOER high RPM check.
415 Idle Air Control system at maximum adaptive lower limit.
416 Idle Air Control system at upper adaptive learning limit.
452 Insufficient input from VSS.
453 Servo leaking down.
454 Servo leaking.
455 Insufficient RPM increase.
456 Insufficient RPM decrease.
457 Speed control command switch(s) circuit not functioning.
458 Speed control command switch(s) stuck/circuit grounded.
459 Speed control ground circuit open.