GM Automotive Technicians Technical Discussion and Fixes for Sep 14, 2004 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	2002 Cadillac DeVille 4.6L bac k seat VIN: 1G6KD54Y22 Hi my name is Diego , i have a problem whit this car for a few months ,at the first time we thoug was somthing simple like a open window, but know we don't know what happens , we already check the blidding system and the hose are working propperly,all the duct...	View
	2002 Cadillac Escalade 6.0L front and rear diff VIN: 1GYEK63N02 escalade with all wheel drive, front and rear differentials seem to be bound. when making sharp turns either left or right, the limited slip differential is in limited slipping, seems like both diffs have a locker in them. i know of the tsb about the new fluid...	View
	1994 Chevrolet C3500 5.7L MIL Lamp on, no communication VIN: 1GCGC34K7R Vehicle was towed in for a no-start concern, cranks ok...upon checking we found no CEL...plugged scanner in, and was unable to communicate...later we learn that the customer tried to jump start w/a 36volt hi/lo...I found the PCM burnt real bad...I replaced the...	View
	1994 Chevrolet Lumina APV 3.1L Exterior tail light circuit VIN: 1GNU06D4RT This vehicle blows the tail lamp fuse at times. No ryme or reason. It can be sitting still and the short arrives. Short circuit finder is hooked up and detects short with rear light harness totally disconnected including license plate light. We have checked al...	View
	1997 Chevrolet K1500 5.7L engine VIN: 2GTEK196V1 when pulling a trailer engine starts to detonate as the more load is applyed , wont reproduce under normal load . also burning 4 l of oil since last oilchange	View
	1999 Chevrolet Corvette 5.7L warning indicat VIN: 1G1YY22G0X Hello GM guys. I have a Corvette that as soon as you turn the key on and again when turning off I get a message on dash saying, SERVICE COLUMN LOCK, AND ALSO SERVICE TIRE PRESSURE MONITOR SYSTEM. I tried resetting from the dash, worked for a few minutes then r...	View
	1999 Chevrolet Silverado 1500 5.3L Cooling Systems VIN: 2GCEK19T4X this truck has a un-explained loss of coolant. there are no leaks what so ever, it holds pressure with a tester and we block checked it with fluid to no avail. the bottle will empty in about a week and a half and low coolant lites comes on. no dried up trails ...	View
	1999 Chevrolet Tahoe 5.7L entire power loss I got a tough one, this vehicle loses all electrical power while driving. it only happens for about ONE SECOND, when it happens the engine shuts off, all electrical components shut off, the clock resets to 1:00. It will do this frequently but only while drivin...	View
	2000 Chevrolet Blazer LS 4.3L whole vehicle VIN: 1GKDT13W2Y HI, We have been after this vibration which seems to come from the front floor area, is present in the steering wheel a bit, and generally all around. It occurs at 65 to 70 the strongest. We have been over the vehicle from end to end and can not find the cause...	View
	2001 Chevrolet Tahoe 5.3L keyless entry VIN: 1GNEK13TX1 Vehicle came in for an intermittant inability to gain access to vehicle using keyless entry fob. Used secondary fob at time of problem and still no access allowed. None of the buttons would work. Wait awhile and would function. Would not ever duplicate problem...	View
	1994 GMC Jimmy SLE 4.3L Cuts out, Stall VIN: 1GKDT13W1R hi group this thing will run horrible or just quit or surge, originally found cracked magnet in distributor, fuel pressure was weak at 50 psi replaced pump, and cpi unit was leaking, all data looks normal, lttrim 138 fttrim 129, iac,ect,map,iat etc all check o...	View
	1999 GMC Sierra 1500 SL 5.3L Brake Pedal VIN: 1GTEC19T8X Hi IATN Group, My customer states that at times the brake pedal goes to the floor and she hears clicking noise from under left front area of vehicle. The master cylinder has been replaced with a factory unit and the brakes are OK. There are no ABS codes stored...	View
	2000 Pontiac Bonneville SE 3.8L battery VIN: 1G2HX54K8Y hello, this vehicle came in with a no start condition. battery was completely dead and would not hold a charge. replaced the battery and retested alternator. everything fine 'till car sat for 2 days. battery was dead. checked for draw and found draw in abs, ip...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1961 Chevrolet CORVETTE 283CID hard hot restart VIN: 12345678NA i received many responses on my problem . it turns out that the larger jets do go in the primary side because of the use of metering rods. car ran fine when done .customer said car never ran so good which is what we all like to here.many thanks for all the res...	18
	1986 Chevrolet Corvette 5.7L low coolant warning VIN: 1G1YY6786G alldata shows the low coolant module behind instrument cluster above fuse box.	2
	1995 Chevrolet K2500 Suburban 6.5L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1GNGK26FXS Sent this trk back to diesel shop for engine replacement under warranty. Everything in the injection system checked out to the best of our abilities (not having diesel experience). Injection timing was advanced 2 deg, when it was reset to 3.5 the engine ran te... Trouble codes: 13 (engine shut off driver fault), 48 (intake air temp sensor circuit high), 62 (turbo sensor circuit low), 91 (cyl balance failure 1 cyl).	5
	1998 Chevrolet Cavalier 2.2L airbag VIN: 1G1JC5244W I recievd one reply about pulling out the front passenger seat and lift the rug to seeif the module had signs of water damage sure enough the module was all corroded I installed anew one and all is well.	3
	1998 Chevrolet K1500 Cheyenne 5.7L No Start, Stall VIN: 1GCEK19R3W First of all, I would like to thank all who took the time to reply. Two had the right suggestion that the culprit was the vcm-pcm. I had the same suspicion, but needed some moral support to help me spend $280 + dollars of my customer's money. The kicker on thi...	7
	2000 Chevrolet Corvette 5.7L directionals VIN: 1G1YY32G34 Hi, As per the customer the vehicle has not had the directional problem reoccur after a couple weeks. We were never able to recreate the problem so it came down to listening to the customer and how and when it may occur. Our first thought was the multi switch ...	3
	1998 GMC Sonoma SL 2.2L No Start VIN: 1GTCS1447W thank you for the replies. the problem was the new bcm has to be programed. this had to be done with a tech 2 and a techline terimal. a good friend at a dealer did that for me. the anti-theft system was why it would not start. the bcm would not commuacate with... Trouble codes: U1000 (no class 2 communnication), P1632 (theft deterrent system-fuel disable).	3
	1994 Oldsmobile 88 Royale 3.8L fuel pump VIN: 1G3HN52L9R thanks for all the replies, a majority of you were right on the mark...pulled back to the driver's floor carpet to expose a ground 'junction' that was taped to the wiring harness, gave it a wiggle and amazingly the car wouldn't start and the vehicle had no pow...	21
	1999 Pontiac Grand Prix GT 3.8L Hesitation VIN: 1G2WP52K7X Frist let me thank all those that replied to my request.But the customer has not called since we last worked on it and I am ready to let the sleeping dog lie. If the customer can't return your calls must be its working. The last thing we tried was to clean...	14
	2002 Pontiac Grand Prix SE 3.1L Hesitation, Surge, Cuts out, Misfire VIN: 1G2WK52J52 A special thanks to all who helped with this problem child. Jim from MN, Paul from OK, and Paul from IL all suggested fuel pump volume. Dan from IL was sure it was clogged injectors. Brian from NC suggested we look for a possible ignition misfire. Brian from M... Trouble codes: P0300.	7

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