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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 20, 2008
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Open Help Requests for GM
Help Request Answers
1998 Buick Regal 25th Anniversary Edition 3.8L heater blower motor VIN: 2G4WF5210W
Car came in with a dry bearing noise in blower motor when on low speeds. ordered aftermarket motor and installed. motor comes on for a few seconds and then shuts off, repeatedly. plug old motor back in, works fine. Ordered factory motor,, does the same as afte...
2003 Buick Park Avenue 3.8L power seats VIN: 1G4CW54K03
I just bought this car and the power seats don't go up or down. The motors run, but the screw doesn't turn and the seat don't move. I think it strange that both the driver and passenger seats have the same malfunction, unless this is a come problem with this s...
2003 Buick Rendezvous CX 3.4L Cuts out VIN: 3G5DB03E63
Net Techs, Hoping someone might have an idea of where to go on this one. This vehicle has a very intermittent problem. I have driven this thing over 200 miles with no problem. Customer says that at highspeed (60-75 mph) it will violently shake and will not a...
1996 Chevrolet K3500 7.4L MIL Lamp on VIN: 1GBJK34J5T
Hello Chevrolet/Gm techs.. I'm almost exclusively a Ford shop but we have a 96 3500 series 7.4 in our fleet that runs like a 'swiss watch' at all throttle angles/loads.. We're trying to get thing past CA smog to sell/auction it, but it keeps setting P0300 for... Trouble codes: P0300 (Random Misfire)
1998 Chevrolet K1500 Cheyenne 5.7L Hesitation, Cuts out VIN: 1GCEK19R9W
I have a customer that had a problem out on the road, and had to have his fuel pump replaced. Now after driving awhile the fuel pressure will drop to 50-55 lbs and has no power and accually loses speed on the road. When acting up when the accelerator is presse...
1999 Chevrolet Silverado 2500 6.0L 4x4 VIN: 1GCGK29U6X
When truck is put in 4 wheel drive & try to turn truck the truck acts like it frount u joints are binding up like the old type of cross u-joints when locks up. When I take it out of 4 wheel drive it drives & turns fine.
2001 Chevrolet Silverado 2500 HD 6.6L transmiision, speedo cluster VIN: 1GCHK291X1
when you 1st start vehicle instrument cluster delays coming on, tach not working or other guages then starts working... also sometimes when put in gear trans will do nothing at all, turn off and back on then works, batterys check good and charging system worki...
2001 Chevrolet S10 LS 4.3L batt light, fuel gauge, temp gauge, security light VIN: 1GCDT13W71
Customer said that it was running fine and was up north and would not start. Had truck jumped then security light came on and had the key relearned. Now it starts and runs but the battery light is on all the time but gauge shows 14 volts. The temp and fuel gau...
2002 Chevrolet Trailblazer LS 4.2L No Start VIN: 1GNDS13S62
anyone know where i can get a ect senser for this suv. it seems to be back ordered for the last 3 months
2003 Chevrolet Cavalier 2.2L missing vin sticker VIN: 1G1JC52F93
Bought car from local woman.After checking car over,we found that the vin and tire size stickers were missing from the drivers door jamb.Called her up and she said that body shop replaced the door and front fender 2 years back.Called local salvage yard and he ...
2004 Chevrolet Tahoe LS 5.3L Electronic VIN: 1GNEK13Z74
this is a persistant intermittant problem. vehicle has never exhibited the symptom while in our hands. however, when customer brings it back there are always dtc's. originally came in with a c0290 and found tsb 05-05-25-003b to replace yaw rate sensor with up...
1996 Geo Tracker 1.6L MIL Lamp on VIN: 2CNBJ1366T
Hello members, been fighting this one for a long time now. First came in about 6 months ago for a MIL, P0400. Followed pinpoint tests and found egr pressure transducer to be a problem but also suspected the egr valve to be a problem due to the pintle sticking ... Trouble codes: P0400 (egr flow)
1996 GMC K2500 Suburban 7.4L cranking VIN: 3GMC48277W
I have a Suburban that died going down the highway and now cranks uneven and "hard" like the timing is way advanced and will not restart. I replaced the cap and rotor to no avail, I found a TSB that fits my symtoms but want to check for any knowns also. Thanks...
1997 GMC Savana 2500 5.0L Misfire VIN: 1GTFG25M4V
replaced vcm with used for water damage, replaced worn distributor, replaced fouled plugs, runs but misses on #2 #7 does not show up on missfire counters. tried another vcm same thing same two cylinders did injector balance test with both vcm's all injectors d... Trouble codes: P0341 (cmp sensor circuit)
2002 GMC Envoy SLE 4.2L Squeals VIN: 1GKDT13S62
Hey everyone, We've got an envoy here that won't stop sqealing. The noise is from the right hand side, and will come and go. Seems to stop and start whenever you hit a bump or dip in the road. The noise changes in intensity with speed. I have ruled out the en...
1998 Pontiac Sunfire SE 2.2L abs VIN: 1G2JB5241W
ABS and red brake light on continuous. Trouble code C1286 stored- EBCM turned on red brake warning indicator. No other codes stored. Flow chart doesn't provide much diagnosis on this one. Cleared code. C1286 returns without any others. Any insight on this one?...
2000 Pontiac Sunfire GT 2.4L Surge, MIL Lamp on VIN: 3G2JD12T3Y
This 2000 pontiac Sunfire came in with a ses light on, stored code p0420 - cat efficiency failed. Freeze frame showed it happend at idle. The o2 sensors are good. The cat was replaced 4000 kms ago. The car does not idle smooth, surges slightly. Vacuum is stead... Trouble codes: P0420

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal 25th Anniversary Edition 3.8L Cuts out, Misfire VIN: 2G4WF5218W
well i finally got it . on a very long test drive i was able to see the trans tcc duty cycle up to 83% and while just tipping in to throttle was able to see trans slip to 4oo rpm . we pulled trans and pan and valves in valve body were full of aluminum. we susp...
1987 Chevrolet Camaro Z28 Iroc-Z 5.7L Poor Idle Quality, Stall, Misfire VIN: 1G1FP2180H
Found low compression in # 5 cylinder, exhaust valve spring was broken. Cranking compression and leak down were okay but found running compression to be low. Never heard popping noise. Installed a new spring and car runs like a champ. Trouble codes: 45 (rich running).
1997 Chevrolet Lumina 3.1L Misfire, MIL Lamp on VIN: 2G1WL52M4V
Vehicle is fixed and gone! Received 8 replies suggesting compression problem, broken valve spring, PCM, mechanical problem, checking companion cylinder and I went over them all with no luck. I did go back into the fix database and read more carefully and saw...
2001 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y1SK52871
Thank You for all the responses, we installed OE catalytic converter and customer has not returned. Trouble codes: P0420 (Catalyst Effiency below threshold).
2004 Chevrolet Colorado LS 2.8L blower motor VIN: 1GCCS19884
hey guys thanks for the help and i found the problem to be in the ground pack located on the fender well by the air cleaner. the connection where the spades go into the clip connector was pushed back and not making a good ground connection all the time. i se...
2006 Chevrolet Express 2500 4.8L No Start, Stall VIN: 1GCGG29V46
Replaced pass lock assembly due to possible cause. Customers concern still present at times. Still suspect probable bcm, but looking to borrow a tech2 for specfic data information. Thanks for everyones help! Trouble codes: 171 (lean o2), 174 (lean 02), 336 (crank sensor).
2006 Chevrolet Colorado LT 3.5L timing chain tensioner VIN: 1GCDT13676
thanks for all the input, it convinced us to go ahead and pull the engine to replace tensioner. you could tell the tensioner was bad when comparing it to the new one. my guess is that when we used the wedge tool , it was driven down too far, causing internal d...
2008 Chevrolet Avalanche LT 6.0L drive train VIN: 3GNFK12Y18
Thanks to all who sent in with this one.I guess that is a "normal" condition and there is no fix for it.Thanks again,Doug
1997 GMC Sonoma SLE 4.3L Misfire VIN: 1GTCS19X1V
we've fixed this vehicle thanks to the overwhelming response from so many members. it was pretty much a consensus that the problem must be in the distributor since we had already done the fuel injector. the drive gear had extreme wear in addition to the play i...
1998 GMC Jimmy SL 4.3L tcc pwm VIN: 1GKDT13W25
Well its fixed the slow responce of voltage must have been the problem. A used ecm fixed the problem,after the relearn process,it started and ran just fine, drove 5 miles with no code. Alex thought maby the ign switch but I didn't have any probllems with the ...
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