20 Most Recent 1994 Chevrolet C/K 2500 Questions & Answers

What's with the 1994 C/K 2500 above an 2007 Silverado ? 07 on 94 frame ? New body have all the 07 electronics ? Power Window System Controls (RPO A31/AN3/DL3) The power window system will operate anytime the Retained Accessory Power (RAP) system is active or when the ignition switch is in the ACCY or ON position. The driver master control switches are integrated into the DDS. When a power window switch is activated in the up or down positions the DDS supplies power and ground to the window motor control circuits to drive the window motor in the required direction. Prior to activating a power window motor the DDS will supply the control circuit with a low current bias voltage in order to determine that a short to ground condition does not exist and during window motor operation the DDS continues to monitor the motor current to verify proper window motor operation. The DDS controls the passenger window through a GMLAN message to the PDS. When a power window switch is activated in the up or down positions the PDS supplies power and ground to the window motor control circuits to drive the window motor in the required direction. Prior to activating a power window motor the PDS will supply the control circuit with a low current bias voltage in order to determine that a short to ground condition does not exist, and during window motor operation the PDS continues to monitor the motor current to verify proper window motor operation. (Scan tool support is available for this system) Do you know what GMLAN is ? serial data communication network How to Diagnose Controller Area Network CAN GMLAN is general motors C.A.N Passenger Power Window Inoperative

1. Ignition OFF, disconnect the C1 harness connector at the PDS.
2. Test for less than 1 ohm between the ground circuit terminal 6 and ground.
?‡' If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
?‡' If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Ignition OFF, reconnect the harness connector at the PDS.
5. Ignition ON, observe the scan tool Passenger Window Switch parameters while using the passenger power window switch. The reading should change between Off/Up/Down/Express Down.
?‡' If the parameter does not change, replace the PDS.
6. Ignition OFF, disconnect the harness connector at the passenger window motor.
7. Connect a test lamp between control circuit terminal A and control circuit terminal B.
8. Ignition ON, command the passenger window UP and DOWN by using the passenger window switch. The test lamp should illuminate when commanding the UP and DOWN states.
?‡' If the test lamp is always OFF during either of the commands, test for a short to ground or open/high resistance on either control circuit. If the circuits test normal, replace the PDS.

?‡' If the test lamp is always ON, test for a short to voltage on either control circuit. If the circuits test normal, replace the DDS.

9. If all circuits test normal, test or replace the passenger window motor.

Check your fuses for dashlight

Your local library will have automotive books that will give you the specs you need.

Labor Guide Book on a 20 year old vehicle ! Any trans or repair shop will give you something close to what they charge for various services

Replace or rebuild transmisison.

Automatic or manual trans ?

Jack the truck up. use jack stands! Remove the starter so you can unbolt the flywheel from the torque converter. Support the ****** with a ****** jack (or equivilant) Disconnect the wiring. Unbolt the ****** trom the engine. Unbolt the ****** cross member and drop the ****** out....reverse to install

Sounds like the flasher relay is bad. There is a separate one for the turn signals and hazards. Below is a diagram of its location. It kind of looks backwards but just look where the arrow is pointing to the front of the vehicle. I hope this helps...

check horn relay in engine bay fuse box

Sounds like the ground for your ECU is bad. Not sure where yours is, but many vehicles have that ground on the engine, often on top, near the engine wire harness. Ask a Chevy guy or dealer where the ground is, so you can check it and repair it.

buy a new starter.. it needs replaced

Check the tires and the front end

get a tune up done. spark plugs, wires , air filter. wouldnt hurt to change the differential fluid. if it has 4 wheel drive then get the transfer case oil done as well and front differential and have the whole viechel greased where ever there is a grease fitting, llike driveshafts, front axle joints. any friction won't help at all.