GM Automotive Technicians Technical Discussion and Fixes for Mar 26, 2004 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1998 Cadillac DeVille 4.6L Stall VIN: 1G6KD54Y7W Hey there guys... I have yet another mystery machine here. A month ago, I had the engine completely out of this vehicle to reseal the lower crankcase. I pulled the engine out the top and never even had the intake manifold cover off the engine. I pulled it as ...	View
	2002 Cadillac Seville STS 4.6L rh low beam VIN: 1G6KY549X2 Help needed from cadillac techs. This is my personal vehicle just purchased. The rf low beam seems to work when it feels like it. Sometimes it does and sometimes it does not. The bulb is good because when it wants to, it works. Have swapped relays from high an...	View
	1990 Chevrolet Camaro RS 5.0L Idle VIN: 1G1FP23E91 Any General Motors techs out there ...HELP!! This Camaro is driving me nuts. Runs great! Sitting at an Idle if you go to high fan and the a/c is on it will act like someone just pulled a plug wire off. Cut the fan and the A/c off it idles smooth. Cked pressure...	View
	1991 Chevrolet R2500 Suburban Silverado 7.4L 2-3 shift VIN: 1GNGR26N6M hi group this vehicle intermittently goes into failsafe mode second gear only, was at another repair facility they replaced all solenoids, still same issue, know its mine found low voltage to trans 4volts checked ignition switch had burned contacts internally ...	View
	1993 Chevrolet K1500 Suburban Silverado 5.7L suspension VIN: 1GNFK16K5P I have a ratlle/metal quick slapping noise comming from right front wheel over bumps.It is there even with brakes applied. The stabilizer end links were replaced because they were broken. (used Napa links) not factory.The suspension is tight, nothing jumps rig...	View
	1994 Chevrolet S10 Blazer Tahoe 4.3L Surge, Cuts out VIN: 1GNDT13W7R Hello all,We just finished installing the engine after rebuilding it.It appears we finally got the timing set right on this car,but it will run for about 4 seconds and cut off.My tech just tried to get it to run at idle again and now it will run longer,about 1...	View
	1997 Chevrolet Blazer 4.3L Noise when accelerating VIN: 1GNDT13W4V We need help with an engine noise during hard acceleration from the intake area. Replaced leaking water pump, faulty belt tensioner, and serpentine belt. Also replaced spark plugs, rotor & cap for engine surging complaint which has been repaired. Removed air s...	View
	1997 Chevrolet Express 2500 5.0L oil pressure Hello all, This is a friends van. It came from another shop with the check gauges light on and low oil pressure indicated by the gauge followind an oil change. We checked pressure with a mechanical gauge and pressure was 6 psi at idle. We removed the oil pan ...	View
	2001 Chevrolet Silverado 1500 5.3L abs VIN: 2GCEK19T21 The truck belongs to a car lot in town so there is no history at all... When you are coming to a slow stop the abs is activated. I scaned system and it looked like the left front wheel is 1 or 2 mph slower on a light stop. there are no codes in system I replac...	View
	1995 GMC Jimmy SL 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1GKDT13W8S Hello GM Techs: This Gimmy came in with a rough idle rich condition. The customer just purchased. The MIL on and is hard to start. I have to give it throttle to start and then it idles rough. I have done a minor tune-up and still have the same condition. Am i ... Trouble codes: P0141 (heater circuit malfunction bank1 sensor2), P0300 (random missfire multiple cylinder)	View
	1997 GMC Yukon SL 5.7L Excessive Emissions, Poor Fuel Economy VIN: 3GKEK18R3V Gmers, Have this truck running good, Had ECM reprogrammed to aliviate TCC lockup early (Was eating valve bodies, GMwebsite via vin update, delays until 60ish now) and runs better from this, although gas milage suffered. I dont have a problem with this, but th...	View
	1996 Oldsmobile Cutlass Ciera 3.1L Cuts out, Stall hello fellow techs i am at aloss on this one car came into shop running very bad first thing i notice is no check engine light plugged in my scan tool and had mutiple codes off the top of my head i had a 3x reference fault code which was the cam sensor, a co... Trouble codes: 0706 (trans select out of range)	View
	1997 Oldsmobile Aurora 4.0L Oil in coolant VIN: 1G3GR62C1V Good morning. I've been around for years and haven't posted in about four years. Some of you may recognize me from TFFN or The Ford Six Performance web sites. This car was donated to us and we're trying to decide whether to repair and redonate it or just sel...	View
	1991 Pontiac Grand Am LE 2.5L orifice tube VIN: 1G2NE14U3M I need to find the location of the orifice tube in this system.I am doing a r-134a retrofit and would like to replace the orifice tube with a variable tube.Have had good results using these.My Chiltons A/C book shows the location to be in the condenser but the...	View
	2000 Pontiac Montana 3.4L Right sliding door VIN: 1GMDX03E0Y Hello everyone, I have this Montana that the power sliding door does not work with any of the switches including the key fob. It DOES work if I manually unlatch the door handle. Once the door is opened all switches will cause the door to close automatically. W...	View
	2000 Pontiac Grand Prix SE 3.1L speedometer and odometer VIN: 1G2WJ52J7Y Hi Techs - this is a really strange one. Our body shop has this Grand Prix, which spun into a telephone pole and damaged the P/S front fender, spindle and blew both airbags. This car will register 40 mph on the speedometer and will rack up mileage as soon as ...	View
	2000 Saturn SL2 1.9L airbag light on VIN: 1G8ZK5275Y after minor repairs to framehorn and minor repair to original bumper cover, air bag components that dealer recommended were all replaced- airbag light stays on and codes wouldn't clear- code B1001 always comes back- this code isn't listed in MOD and I have no ...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1991 Buick Riviera Luxury 3.8L oil pump VIN: 1G4EZ13C4L Thanks again fellows It was the cam bearing walk itself out of the cam saddle, we put oil in the oil sending unit hole UNDER PRESSURE(with the oil pan off) and it came out of the third journal of the cam with no resistence. THANKS AGAIN FELLOWS. jOHN	11
	1993 Buick Skylark Custom 3.3L tachometer VIN: 1G4N1154N0 I received a hint reply about the car RIDE CONTROL (controlled shock absorvers) causing this problem. I found broken wires at the top of one absorver and two absorver motors bad. Don´t ask me why there is relationship between the ride control and the 'jumpin...	3
	1996 Buick Park Avenue Ultra 3.8L Stall VIN: 1G4CU5219T thanks for all the replies. wanted to wait a while to see if the vehicle was actually repaired, and no other symptoms appeared. loose ecm connections will get you every time.the vss signal was faster than the scanner. still dont know why it would not set a cod...	13
	1995 Cadillac DeVille 4.9L oil pan gasket VIN: 1G6KDS2B9S This Cadillac is back together and gone with no leaks we could see while it was here. We used the Felpro plastic/rubber gasket and had to dimple the bottom of the oil pan about 3/8' to keep it from hitting the oil pump. I received 5 replies. 4 mentioned method...	5
	1984 Chevrolet Corvette 5.7L High Idle 1400 RPM VIN: 1C1AY0789E I want to thank everyone for all the help, especially Bob [...]. He hit the nail on the head for checking for an internal vacuum leak. Goes to show to check the basics before assuming there is a problem with something else. Also, had I not had cranial rectu...	31
	1992 Chevrolet C3500 Cheyenne 5.7L Hesitation VIN: 1GBJC34KON Well thank you for everyone's help. I had replies regarding restrictions in the lines, bad pressure regulator, poor electrical connection at hanger assembly, pinching return line to check pressure, and checking voltage drop on positive side. I checked everythi...	11
	1994 Chevrolet Beretta 2.2L Excessive Emissions, Poor Idle Quality VIN: 1G1LV154DR Thank you all, The problem was the gasket between the thermostat housing and head. There are two different gaskets. One allows EGR to flow all the time. WE really didn't catch the car idled that bad when we drove it into the shop before the head work. Second...	14
	1996 Chevrolet Tahoe LS 5.7L No Start VIN: 1GNEK13R5T Thanks to everyone for your help i cut the tach wire at the coil and all seems to be well after two days of rain it has not not started. The customer is going to drive it and make sure its ok befor we get into the harness.	7
	1998 Chevrolet K3500 Cheyenne 5.7L convertor VIN: 1GCHK34R5W thanks for all the help especially bill from michigan the truck has been working good for couple days so i'm going to call it fixed. what we found , when we rebuilt it originally the center support bushing was changed. unfortunatlly it wasn't compared to the o...	9
	1998 Chevrolet Malibu LS 3.1L cooling fan VIN: 1G1NE52M2W Kevin [...] is the only one who hit this one on the head. I had the computer reprogrammed at the chevy dealer today, and when I got it back from them it was still the same. I discovered when I went on a drive with the car that the fans won't shut off unt...	12
	1995 Pontiac Bonneville SE 3.8L Surge, Cuts out, Stall, MIL Lamp on VIN: 1G2HX52K2S swapped ign. module and also checked magnet on cam sprocket all ok, replace computer test drove ok, thanks all Trouble codes: P0341, P0361.	8

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