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Changing plugs 2002 envoy 4wd I6

Changing plugs

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What aspect of this do you require assistance with? remove the old ones ONE AT A TIME and replace them with new ones. Your local auto parts store will be able to cross reference and provide you with the proper plugs. Dont overtighten them when replacing.

Posted on Jun 19, 2009

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Wat is the gap for spark plugs on 2003 gmc envoy i6


Finding the answer to this question will help a man make the right decision when making a purchase.



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Sep 08, 2016 | 2003 GMC Envoy

1 Answer

Envoy 2002 drive selector not working


The fact that it flashes 5 times means that it is trying to tell you what is wrong, you may have a faulty selector unit

Dec 14, 2013 | 2002 GMC Envoy

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When I switch my 2002 envoy into 4wd it does not engage and 4wd service light comes on? How can I fix this problem as it worked fine before


This problem could be the Transfer Case actuator/motor or the spline disconnect assembly at the front differential, or a bad Transfer Case Control Module. The other important maintenance action that needs to happen every 50K miles is the transfer case fluid needs to be changed.
Repair of these item is probably not for a unintiated DIY'r.

Jan 21, 2013 | 2002 GMC Envoy

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Using oil looking for possible fix on a 2005 envoy denali


GMC Envoy problems and GMC Envoy repair histories -- car repair descriptions reported ... by car, to see how many repairs each car required and where the car is located. ... 5.3L V8; 2006 291-horsepower 4.2L I6; 2005 275-horsepower 4.2L I6; 2004 ... Advised by OnStar not to drive and have it towed. ----------------------------------------------
galletto 1260

Dec 20, 2012 | 2005 GMC Envoy Denali

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2002 envoy code co550


you need to replace the tccm and get it programmed.


2-04-21-006E: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set No Communication with TCCM (Reprogram Transfer Case Control Module) - (Jul 20, 2006)
999999995.gif Subject: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set, No Communication with TCCM (Reprogram Transfer Case Control Module) Models: 2004 Buick Rainier 2002-2004 Chevrolet TrailBlazer, TrailBlazer EXT 2003-2004 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2002-2004 GMC Envoy, Envoy XL 2003-2004 GMC Sierra, Yukon, Yukon XL 2004 GMC Envoy XUV 2002-2004 Oldsmobile Bravada with Electronic Shift or Active Transfer Case (RPOs NP1, NP4 or NP8)

This bulletin is being revised to add Subject information and change the labor operation. This bulletin cancels and supersedes Bulletin Number 03-04-21-006. Please discard Corporate Bulletin Numbers 02-04-21-006D and 03-04-21-006 (Section 04 -- Driveline/Axle).
ConditionSome customers may comment that the 4WD/AWD indicator lights on the selector switch do not work, or the 4WD/AWD system may be inoperative and/or the service 4WD light is illuminated. The condition is typically intermittent and always occurs at key-up. Upon investigation, the technician may find DTC C0550 set.
CauseThe Transfer Case Control Module (TCCM) has not received the wake-up call during key-up and has remained in the "sleep mode".
When the TCCM is in the "sleep mode", it will not communicate with the class II bus or the Tech 2®.
Correction
  1. Try to communicate with the TCCM. If no communication, go to step 2. If communication is possible, go to step 5.
  2. Remove the underhood (ATCM or TREC) TCCM fuse.
  3. Wait 30 seconds.
  4. Reinstall the fuse. The module should "wake up" and communicate with the Tech 2®.
  5. Check for codes in the TCCM. If a C0550 is found current or in history with or without other codes, replace the module and go to step 6.
  6. Reprogram the TCCM with the latest TIS software using normal SPS procedures.
  7. Verify operation and that no codes are present.
Important: For the 2002 model year, the TCCM must be replaced and reprogrammed.
Warranty Information

Jul 29, 2011 | 2002 GMC Envoy

1 Answer

2004 chevy envoy changed the sparks plugs not there isnt any pressure and it is missing


I6 engine I take it? A very common problem is for the coil boots not to seat on top of the plugs correctly. Double check these, I see this error all the time and have done it myself. Feel or listen for the little click when re-installing the boots. Also, make sure your pcv hose on the plastic resonator is re-attached along with the tiny hose that goes to the fuel pressure guage, another thing that is commonly missed. Again, been there made that error.

Jun 23, 2011 | 2004 GMC Envoy

1 Answer

What are the torque specs for the main caps?


Engines & Power (more) Four-Wheel Drive Trims
spacer.gif Laredo 4WD TSi 4WD Limited 4WD Orvis 4WD Standard Engine 4.0L 185 hp I6 4.0L 185 hp I6 4.0L 185 hp I6 4.0L 185 hp I6 Horsepower 185 @ 4600 RPM 185 @ 4600 RPM 185 @ 4600 RPM 185 @ 4600 RPM Torque (lb-ft) 220 @ 2400 RPM 220 @ 2400 RPM 220 @ 2400 RPM 220 @ 2400 RPM Rear-Wheel Drive Trims
spacer.gif Laredo 2WD TSi 2WD Limited 2WD Standard Engine 4.0L 185 hp I6 4.0L 185 hp I6 4.0L 185 hp I6 Horsepower 185 @ 4600 RPM 185 @ 4600 RPM 185 @ 4600 RPM Torque (lb-ft) 220 @ 2400 RPM 220 @ 2400 RPM 220 @ 2400 RPM

Nov 12, 2010 | 1997 Jeep Grand Cherokee

1 Answer

My 2002 GMC envoy 4wd switch lights do not light up at all, not even on start. The fuses are all fine. Is there some other power source?


no, you may have a bad switch or 4wd module,i ve done afew that had bad switches, but i would check it before just replacing it,

Dec 13, 2009 | 2002 GMC Envoy

1 Answer

My 2002 Envoy will not shift into 4 wheel drive or anything other than 2WD. The lights are not lighting up on the switch and the fuses have been checked and good. Any ideas?


check the transfer case selector motor, they go bad and thats what happens, no 4wd and no other lights on switch because its not doing any changing of the tranfer case, to test remove motor ground it and with connector connected, try to switch to 4wd see if motor moves, you can use a test light to make sure its getting power, hope this helps.

Dec 13, 2009 | 2002 GMC Envoy

1 Answer

2002 envoy 4wd problem. clicking sound comes and


Clicking sound- Possible electronic fan clutch failing. This is a typical problem with the 4.2L I6. When you hear the clicking, open the hood and listen if its coming from the fan clutch on front of the engine. this could also cause abnormal engine and transmission cooling. As for the "N" light and 4wd issue, have scanned at the dealer....Hopefully this helps

Jul 18, 2009 | 2002 GMC Envoy

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