Top 20 2003 Chevrolet Avalanche Questions & Answers

Question edited for clarity. Question moved from MISC to model category. Aftermarket ideas https://www.google.com/search?q=2003+Chevy+Avalanche+stereo Here is the factory wiring diagram.

2003 Chevrolet Avalanche Car Radio Wiring Diagram

https://www.modifiedlife.com > 2003-chevrolet-avalanc... Nov 17, 2011 - 2003 Chevrolet Avalanche Speaker Wiring Guide ; Left Front Speaker Negative Wire (-), Gray ; Right Front Speaker Positive Wire (+), Light Green.

It sounds like you aren't using it enough and the battery is losing power. Invest in a battery charger, they are about $20. Mine has 6 amp for a full charge or 2 amps for a trickle charge. charge the battery overnight when you know you are going out. Put it on charge at least every couple of weeks. Lead Acid batteries need to be kept fully charged. Something may be draining the battery faster than normal. That is called 'parasitic draw'. Hard to diagnose, but can be done. If the battery does go completely flat, you need to reset the security system. Finally, many car electrical systems need a full 13 volts to start due to the electronics. Good luck Kristin.

Go to any parts store or dealer and they should be able to help you.

What is the DTC - diagnostic trouble code ? No code tells you a part is bad . Diagnostic testing procedures are given for each code the vehicle can set . Your vehicle can set numerous code's for the electronic throttle control an not one of them tell's you out right to replace the throttle body or the APP sensors . Looking at factory service repair info for the code an doing diagnostic testing befor replacing any parts should be done. The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions: • Accelerator pedal position sensing • Throttle positioning to meet driver and engine demands • Throttle position sensing • Internal diagnostics • Cruise control functions • Manage TAC electrical power consumption The TAC system components include the following: • The accelerator pedal position (APP) sensors • The throttle body assembly • The throttle actuator control module • The powertrain control module (PCM) Accelerator Pedal Position (APP) Sensor The accelerator pedal assembly contains 2 individual APP sensors within the assembly. The accelerator pedal position (APP) sensors 1 and 2 potentiometer type sensors each with 3 circuits: • A 5-volt reference circuit • A low reference circuit • A signal circuit The APP sensors are used to determine the pedal angle. The control module provides each APP sensor a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module with signal voltage proportional to pedal movement. APP sensor 1 signal voltage is low at the rest position and increases as the accelerator pedal is applied. APP sensor 2 signal voltage is high at the rest position and decreases as the accelerator is applied. Throttle Body Assembly The throttle body assembly consists of the throttle body, the throttle position (TP) sensors, and the throttle actuator motor. The throttle body functions similar to a similar to a conventional throttle body with the following exceptions: • An electric motor opens and closes the throttle valve. • The throttle blade is spring loaded in both directions and the default position is slightly open. • There are 2 individual TP sensors within the throttle body assembly. The TP sensors 1 and 2 are potentiometer type sensors each with 3 circuits: • A 5-volt reference circuit • A low reference circuit • A signal circuit The TP sensors are used to determine the throttle plate angle. The control module provides each TP sensor a 5-volt reference circuit and a low reference circuit. The TP sensors then provide the control module with signal voltage proportional to throttle plate movement. Both TP sensor signal voltages are low at closed throttle and increase as the throttle opens. Your best bet , take it to a qualified repair shop.

You have a parasitic draw on the battery , Testing to find the draw isn't too hard ,all you need is a DMM - digital multi-meter . Test for voltage drop over the fuse's . I know GM vehicles had instrument cluster problems that would cause this problem , but test first . Watch these videos . The BEST Way TO Perform Parasitic Draw Test Chevrolet Truck Battery Dies Overnight Part

you have to buy the special tool to release the line any autopart store will have it for under 20.oo bucks

When you unplugged the alt,did you disconnect the larger alt output power wire?That.s usually where a power draw will be in an alt as this wire is connected to the diodes.

Doesn't use a fuse , ues a circuit breaker . These very rarely go bad .The right rear door works ? Uses same circuit breaker as front passenger door. The power windows an locks on your vehicle are controlled by electronic control modules . FPDM - front passenger door module , I would look for a broken orange wire inside the flex boot from the body to the front right passenger door . This is power supply to the passenger door module . Do you know what wiring diagrams are ? Free here http://www.bbbind.com/free-tsb

what about a broken timing belt cam shaft /crank shaft position sensor or failed immobilizer

Not to question your ability, if you listen from the drivers seat while driving, just do yourself a favor, check the rear brakes, funny how sound travels and tricks the mind

Just a question. Does the truck do this after the truck is warmed up. If not this is a temp. issue and can be a few items. Generally this is an electric switch issue. Remove the fuse from the system when you shut it off for the night and see if it still jumps to 4x4 mode.

GM had insturment cluster problems 2003 to 2006 . Inside is a part called a stepper motor , this stepper motor controls the gauge position . How to repair GM Instrument Cluster Speedometer Gauge Stepper Beside's the stepper motor issue there can also be a problem with something called silver migration , this has to do with the solder used in the insturment cluster . This can cause a number of electrical problems most people would not even think possible . Silver Migration Watch this two videos . Chevrolet Truck Battery Dies Overnight Part Chevrolet Truck Battery Dies Overnight Part II

Being and electronic speedometer, it will surge a touch when engine first started or switch first turned on, that's normal, but the only reason it is not working while driving is most likely a faulty speed sensor. Code should tell you this with a reader.

ecm has been replaced????? was it programmed ?

2 options the brake pads are worn past safe and the small;; spring is running on the disc rotor , or there is a failing cv joint making the noise

PRNDL Display The instrument panel cluster (IPC) displays the selected gear position as determined by the powertrain control module (PCM). The IPC receives a class 2 message from the PCM indicating the gear position. The PRNDL display blanks if: • The PCM detects a malfunction in the transmission range switch circuit. • The IPC receives a class 2 message indicating the park position and the column park switch indicates a position other than park, open input. • The IPC detects a loss of class 2 communications with the PCM. Could be the transmission range sensor . Testing would need to be done , hooking up a scan tool ! Doing electrical testing etc...

Take it to auto parts store an have diagnostic tool hooked up to read codes >

take out the speaker in question and test it. a 9v battery is good enough to 'burp' it. if it makes a scratchy noise when you put power to it then you have a short in the voice coil. Burping a speaker is just a short power up. Don't hold power to it. Tap it on and off like a music note measure.

there are no sensors on any car that would keep the starter from engaging even if the fuel tank was completely removed remove the starter and have your local oreillys or autozone bench test it if its good then you have an electrical issue could be related to your ignition switch, starter and or ignition relay or fuses check all of those

https://s1.postimg.org/8oivhsraj3/underhood_fuse_box.jpg Click on the link. I looked at your owners manual. F pmp in the circle should be fuel pump relay, under hood fuse block. I you don't have an owners manual, my.gm.com Has your owners manual, you can look at it for free.