2002 GMC Envoy - Answered Questions & Fixed issues
Why is the a.c. blower staying on after the key is turned off in my 2002 gmc envoy?
you see those fuses, pull/replace them one at time till you pull the fuse that kills the blower motor, then we go from there. see the 40 amp fuse on the left, that is for hi speed. The two middle fuses should only go hot with the key on. Everything off and key out use a test light to check voltage at those two fuses, shouldn't be hot? I can only help with testing. I'd hate to tell you to replace something and it not fix it.
7/6/2021 10:23:46 PM •
2002 GMC Envoy
•
Answered
on Jul 06, 2021
•
300 views
Rear wiper blade won't. irk on 2002 hmm envoy
Did you check the fuse ? Do you hear the wiper motor running ? If the fuse is good you would need to test the electrical circuit for the wiper motor ,viewing a wiring diagram an then use a DVOM - digital volt ohmmeter to test
What body type is it ? Vin 6 or 3 could have a circuit breaker for power supply or fuse ,both are located in the rear fuse block .
Rear Wiper/Washer System Components
The rear wiper/washer system consists of the following components:
• Rear window wiper motor
• Rear window washer fluid pump
• Rear wash relay
• Rear window wiper/washer switch
• RR wiper 15A circuit breaker
• WASH 20A fuse
Rear Wiper/Washer System Controls
• Body control module (BCM)
• Liftgate control module (LGM)
• Rear wiper/washer switch
Here is how it is controlled
Rear Wiper/Washer System Operation
The rear window wiper/washer switch is an input to the BCM. The requested rear wiper mode is sent to the liftgate control module (LGM) by the BCM as a message on the serial data circuit, and the rear window wiper motor is controlled by the LGM. The switch power circuit to the rear wiper/washer switch is a 12-volt reference supplied by the BCM during ignition on, accessory or RAP power modes. The rear wiper/washer switch is a series of resistors and the switch position is determined by the voltage of the rear wiper/washer switch signal circuit to the BCM. The rear wiper/washer switch has continuity at all times and the BCM expects a rear wiper/washer switch signal voltage in all switch positions including OFF. The rear wiper motor is supplied battery positive voltage and ground. The LGM controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the LGM. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode. The liftglass and liftgate ajar switches are inputs to the LGM and must be in an inactive state in order for rear wiper washer system operation to be enabled. When an ajar switch is active the LGM suspends wiper motor operation directly and sends the ajar switch status messages over the serial data circuit enabling the BCM to suspend washer pump operation. The rear window washer pump is controlled by the BCM through the rear washer relay. Battery positive voltage is supplied to the coil and switch sides of the rear washer relay. When the rear window wash request is active the BCM energizes the relay by grounding the relay coil through the rear washer relay control circuit. When the relay is energized battery positive voltage to the relay switch is supplied to the washer pump control circuit.
Your best bet mite be to have a qualified repair shop check for codes in the BCM or LGM
--------------------------------------------------------------------------------
DTC B1017 or B3970
The rear wiper motor is supplied battery positive voltage and ground. The liftgate control module controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the liftgate control module. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode.
3/12/2019 4:05:18 PM •
2002 GMC Envoy
•
Answered
on Mar 12, 2019
•
337 views
I have a 2002 gmc envoy it is displaying a code 1234 and now it want start can anyone explain this to me please
Yeah , P1234 or B1234 An it want or won't start . You need factory service repair info.to know what this is . For all codes there is a diagnostic trouble shooting procedure . Without this info your best bet ,have it towed to a qualified repair shop. 4WD - 2WD . If P - powertrain code factory info doesn't show this code . What cheap code reader are you using . It's not telling you the correct code . Cheap code readers will do this. Your best bet , take it to a qualified repair shop.
2/14/2019 10:20:25 PM •
2002 GMC Envoy
•
Answered
on Feb 14, 2019
•
151 views
How to reset security system for 2002 GM C envoy
website
https://big-manuals.com
helped me repair it within an hour, all by myself!!!! It's amazing, no hassle at all
From wiring d iagrams, schematic illustrations, spark plugs info, parts info, stepwise instructions, torque specs, error/fault codes, engine info, to every single minute parts, you get everyth ing in there you can't imagine how detailed it is
12/8/2018 1:34:24 PM •
2002 GMC Envoy
•
Answered
on Dec 08, 2018
•
560 views
My 2002 Envoy wont stick in a gear when i shift
I'm not sure what you are writing. Does the gear shift selector move but without any resistance? If so, this could be a broken shift cable. If not, the transmission could have lost power and is in need of some type of repair. I would like to provide you with more information but I need more specific details about your SUV, warning lights, maintenance history, recent repairs or engine codes. Did this failure happen out of the blue or get progressively worse over time? Let me know if you can think of anything else. Good Luck.
10/15/2018 4:37:23 AM •
2002 GMC Envoy
•
Answered
on Oct 15, 2018
•
106 views
Como quitar el carter de aceite
Hello good afternon I Need take of top oil “c?rter” but some think about 4x4 don’t can do, My car si GMC envoy 2002
9/18/2018 11:57:22 PM •
2002 GMC Envoy
•
Answered
on Sep 18, 2018
•
192 views
Not finding what you are looking for?