20 Most Recent 2004 Chevrolet Silverado 2500 Crew Cab Questions & Answers

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The valve guide are leaking, expensive fix man.

Throttle Actuator Control (TAC) System Description You have APP- accelerator pedal position sensors or one of the Throttle position sensors is going bad ! In the (TAC) system ! This is drive by wire or electronic throttle control . If you take it to the dealer or a ASE certified repair shop they can check the DTC'S - diagnostic trouble codes ! This is nothing for a DIYer to mess with ! This system can set 7 different DTC'S Reduced Engine Power Mode When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions: ?€¢ Acceleration limiting--The control module will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited. ?€¢ Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited. ?€¢ Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position. ?€¢ Forced idle mode--The control module will perform the following actions: - Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off. - Ignore accelerator pedal input. ?€¢ Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator. Drive by Wire Function and Diagnostics by Wells

You will receive a bill in the mail.

1. Raise and support the vehicle.
2. Remove or disconnect the following:
   
   Tire and wheel assembly Caliper and rotor Wheel speed sensor and brake hose mounting bracket bolt from the steering knuckle Electrical connection for the wheel speed sensor Front drive halfshaft assembly on four wheel drive models Hub and bearing assembly mounting bolts Hub and bearing assembly O-ring seal from the steering knuckle bore (2500 series)
   
3. Clean and inspect the O-ring seal

To install:

1. Clean all corrosion or contaminates from the steering knuckle bore and the hub and bearing assembly.
2. Install the O-ring to the steering knuckle (2500 series).
3. Lubricate the steering knuckle bore with wheel bearing grease or the equivalent.
4. Install or connect the following:
   
   Hub and bearing assembly Hub and bearing assembly mounting bolts. Tighten the bolts to 133 ft. lbs. (180 Nm). Front drive halfshaft assembly on four wheel drive models Electrical connection for the wheel speed sensor Wheel speed sensor and brake hose mounting bracket bolt to the steering knuckle. Tighten to 106 inch lbs. (12 Nm). Rotor Tire and wheel assembly.

You can go to autozone.com and register for free online repair manual with everything you need.

P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)

The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Powertrain Control Module (PCM) or Engine Control Module (ECM).

Causes for P0332 DTC:
- Knock sensor circuit short to GND.
- Knock sensor circuit short to PWR.
- Knock sensor circuit open.
- Damaged knock sensor.
- PCM or ECM failure.

Solutions:
- Repair or resecure the harness or connector.
- Replace the knock sensor.

Your best bet is to just replace the knock sensor for sensor 2 bank 2. Call Auto Zone with part number SU1282 this is the OEM replacement.

The knock sensor looks like this:

disconnect the alternator the plug as well as the charge cable, and retest for a draw, sounds like the diode is bad in the alternator.

Please see my tip at http://www.fixya.com/cars/r5973094-starter_replace and let me know if you have questions.

You have to pull out the rear drive shaft and then unbolt the transfer case. Unhook the wiring and front driveshaft and pull the case off the transmission. Then change the gasket and reinstall.