20 Most Recent 2002 Chevrolet Avalanche Questions & Answers

First check for fuel and Spark. Also check for the security light flashing in the dashboard. The immobilizer system will kill the spark and fuel injectors

2002 Chevrolet... | Answered on Oct 27, 2019

Does the vehicle start an run ? Check engine light on , codes are stored , hook up scan tool an check codes . GM had issues with instrument cluster gauges not working - new instrument cluster . Does everything else on the vehicle work - headlamps , heater / A/C blower motor etc....

2002 Chevrolet... | Answered on Sep 25, 2019

1- You have to check the transmission oil level.
(Engine running in the park or neutral. )
2- Retrieve transmission trouble code with a scanner.
3- Depends on what code you have
4- Find out if your problem is electrical or mechanical or hydraulic.
5- It could be the 3-4 solenoid, 3-4 shift valve stuck inside valve body..........and so on.
6- At the cluster display the PRNDL display all lights state = on. If not the PRNDL switch on the side of transmission water intrusion.
I believe you need a good Technician if you don't find it.
There are so many things.

Hope it helps.

2002 Chevrolet... | Answered on Oct 05, 2018

get the hac saw and cut away

2002 Chevrolet... | Answered on Aug 01, 2018

You avalanche may be in security mode. If this is the case, you will have to call the dealership and get the code. If that is not the case, you have a bad ignition. You will have to change your ignition box and lock cylinder. Make sure your shifter is all the way up, just in case the cable broke.

2002 Chevrolet... | Answered on Jul 16, 2018

The Trainer 40 When the compressor won compress

back lighting for a couple of the climate control dash board buttons are not working. ?????? wouldn't be a fuse , bulb probably . You would need to take the component apart to replace the bulb .

2002 Chevrolet... | Answered on Apr 02, 2018

  • The junction box under the hood Udrivers side by the battery) has a relay and a fuse that is the power feed for the horn. Start with checking them.


  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

2002 Chevrolet... | Answered on Mar 28, 2018

Is there a computer related code which I must enter via the radio ??? You don't enter anything through the radio !!!!! Having factory service repair info so you can read how the anti-theft system works an a scan tool to pull DTC'S - diagnostic trouble codes is the proper way to diagnose .
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the lock cylinder. The cylinder rotation produces an analog voltage code in the Passlock™ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM)/vehicle control module (VCM). The message enables the fuel injectors.
The design of the Passlock™ system is to prevent vehicle theft by disabling the engine unless the ignition lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the PASS-Key® system. However, the Passlock™ system eliminates the need for a key mounted resistor pellet. The components of the Passlock™ system are as follows:
• The ignition lock cylinder
• The ignition switch
• The Passlock™ sensor
• The Body control module (BCM)
• The security telltale
• The vehicle/powertrain control module (VCM/PCM)

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

2002 Chevrolet... | Answered on Mar 06, 2018

Maybe this will help Peter. I had to capture it in 2 pics because of screen size. The first one is the top half. The 2nd is the bottom with a bunch of the top included as a repeat.

heated seat-5hvdwew1gjvdiup4a5vrothk-5-0.jpg

heated seat 2-5hvdwew1gjvdiup4a5vrothk-5-1.jpg

2002 Chevrolet... | Answered on Jan 20, 2018

you can get a wiring diagram by checking on a chevy blog . There are many harness diagrams that you can blow up and print

2002 Chevrolet... | Answered on Dec 30, 2017

Is the Vehicle flex fuel ? What size engine ?
Fuel Composition Sensor
The fuel composition sensor (FCS), or flex fuel sensor (service parts term), measures the ethanol-gasoline ratio of the fuel being used in a flexible fuel vehicle. Flexible fuel vehicles can be operated with a blend of ethanol and gasoline, up to 85 percent ethanol. In order to adjust the ignition timing and the fuel quantity to be injected, the engine management system requires information about the percentage of ethanol in the fuel.
The FCS uses quick-connect style fuel connections, an incoming fuel connection, and an outgoing fuel connection. The two connections have different diameters, to prevent incorrect attachment of the fuel lines. All fuel passes through the fuel composition sensor before continuing on to the fuel rail. The fuel composition sensor measures two different fuel related parameters, and sends an electrical signal to the powertrain control module (PCM) to indicate ethanol percentage, and fuel temperature.
The fuel composition sensor has a three-wire electrical harness connector. The three wires provide a ground circuit, a power source, and a signal output to the PCM. The power source is vehicle system voltage, +12 volts), and the ground circuit connects to chassis ground. The signal circuit carries both the ethanol percentage and fuel temperature within the same signal, on the same wire.
The FCS uses a microprocessor inside the sensor to measure the ethanol percentage and fuel temp, and change an output signal accordingly. The electrical characteristic of the FCS signal is a square-wave digital signal. The signal is both variable frequency and variable pulse width. The frequency of the signal indicates the ethanol percentage, and the pulse width indicates the fuel temperature. The PCM provides an internal pull-up to five volts on the signal circuit, and the FCS pulls the 5 volts to ground in pulses. The output frequency is linear to the percentage of ethanol content in the fuel. The normal range of operating frequency is between 50 and 150 Hertz, with 50 Hertz representing 0 percent ethanol, and 150 Hertz representing 100 percent ethanol. The normal pulse width range of the digital pulses is between 1 and 5 milliseconds, with 1 millisecond representing -40°C (-40°F), and 5 milliseconds representing 125°C (257°F).
Don't think it will draw the battery down , But you never know with all this electronic stuff . You mite want to have the vehicle checked for DTC'S - diagnostic trouble code's .

2002 Chevrolet... | Answered on Dec 16, 2017

Go to online store reliable they have repair manuals I am sure you will get the solution. Here's the link

2002 Chevrolet... | Answered on Dec 08, 2017

Fuel Pump or fuel filter will be my first guest. Did you pull any Codes from the truck already?


Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/tony_a41fa0b801734e2f

2002 Chevrolet... | Answered on Nov 22, 2017

Assuming your fluid level is ok then I would suspect the master cylinder.

2002 Chevrolet... | Answered on Jul 24, 2017

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