GM Automotive Technicians Technical Discussion and Fixes for Mar 26, 2009 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1991 Cadillac Allante 4.5L 4 analog gauges VIN: 1G6VS3384M Every thing else on this cluster works except temp, oil, fuel and batt gauges whick look like they are having grounding issues. Check all powers and grounds. i am suspicious about pin C9 to the IPC, it is showing almost 10 ohms resistance when all the other gr...	View
	1997 Cadillac DeVille 4.6L wont start VIN: 12G6KD52Y3 Vehicle towed in told possible fuel pump but the dash kept sugesting waiting 3 minutes, no power or ground to the FP relay. Now it says theft problem may not start. Codes at the ipc are b2750 u1255 ,checked the wires in the dash from the switch .887 K ohms but...	View
	1983 Chevrolet El Camino 5.0L Poor Idle Quality, Cuts out VIN: 1GCCW80H9D Hello everyone and thank you in advance for reading this post.We have this El Camino that after repair of the timing cover and chain(timing tab broken,and it's emission time)received replacement catalyst.The vehicle arrived from the muffler shop and it was run...	View
	1997 Chevrolet Camaro Z28 5.7L Differential VIN: 2G1FP22PXV I have a 1997 Chevy Camaro in my shop with a complaint of a noise in the rear differential. It has what appears to be a clicking sound from the diff. when down shifting. So I took it for a drive and you can barely hear it but it's there. I also noticed a littl...	View
	1998 Chevrolet K1500 Cheyenne 5.7L Mechanical VIN: 2GCEK19R4W this came in missing on cyl 6 test compression cyl leakage and replaced injector, good spark and injector is working but, still missing on cyl 6 pulled valve cover and both valves moving,no vacuum leaks no bubbles in antifreeze when pressure on cyl 6 or antifr...	View
	1999 Chevrolet Corvette 5.7L Cuts out, Stall VIN: 1G1YY32G8X first want to say thanks for taking the time to read this. ok i have a 1999 corvette auto trans that when started displays a "service column lock" message. my customer came from the dealer where they told him the recall for this problem was not covered on his ...	View
	2001 Chevrolet Corvette 5.7L cluster VIN: 1G1YY22G01 insterment cluster will show right front air pressure at 31psi. and right rear at 30psi. and shows the same scanned on a tech-2. all well and good insterment cluster will show left front xxx and left rear xxx in dash. on tech-2 shows left front at 148psi and t...	View
	2003 Chevrolet Impala 3.4L blower motor VIN: 2G1WF52E93 this vehicle has an intermitent blower motor opperation at all speeds. when inop, the cruise light comes on in the cluster and at the same time the rear defog is inop. this condition will only last for a very short time 1-5 miles of driving. after that everyth...	View
	1999 Oldsmobile Intrigue GLS 3.5L fuel leak VIN: 1G3WX52H3X thanks up front for your help. this car has a fuel leak at the plastic fuel line that runs from the front fuel rail to the rear fuel rail. there appears to be a plastic splice there as well were it is leaking. I wanted to replace this line but the local dealer...	View
	2000 Oldsmobile Alero GL 3.4L dash VIN: 1G3NL12E4Y intermitent complete dash operation inoperable except for service engine light that works all the time. customer stated dash is slow to come on. we drove car 1 1/2 miles when came in before dash lights & gauges came on - no speedo, warning lights or tach, shut...	View
	2000 Pontiac Firebird Formula 5.7L oil; leak at rear VIN: 2G2FV22G7Y it appears that cam sensor is the leak. my question is there any easy way to reseal the cam sensor without replacing the sensor itself, it appears that the intake manifold must be removed first. any help woulld be much appreciated.	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1995 Buick Riviera 3.8L No Start, MIL Lamp on VIN: 10S4722645 thanks for all the help i got,found that cylinders were washed with gas, that was the reason for no comp,on 3/5.	8
	1995 Buick LeSabre Limited 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Surge VIN: 1G4HR52L0S Hello Fellow Techs, Thank you for all the suggestions. Two people mentioned checking the 6-1 signals at the PCM. When I checked them I found a glitch in both signals at the same time causing them to momentarily drop out that lead me to suspect another consumer... Trouble codes: P0341 (Cam/Crank Error).	20
	1970 Chevrolet CORVETTE 7.4L windshield wipers VIN: 194370S409 GROUND FOR WIPER SWITCH WAS DISCONNECTED AND HOOKED UP TO AFTERMARKET RADIO.WIPER WASHER COVER WAS SHORTING OUT REPLACEMENT WIPER MOTOR.GROUND FOR WIPER MOTOR WAS OPEN CIRCUIT AND NON EXISTANT AT STARTER OR BACK OF BLOCK.INSTALLED NEW GROUND WIRE TO ENGINE GRO...	13
	1997 Chevrolet Blazer 4.3L tip in stumble VIN: 1GNDT13W5V wasn't fuel control problem at all, secondary ignition loss intermtantly on random cylinders only on light throttle. replaced cap and rotor with ac delco parts and all is good.	11
	2000 Chevrolet Blazer LS 4.3L No Start VIN: 1GNCT18W9Y STEVE FROM NEW YORK HIT IT RIGHT ON THE HEAD. I SAT UP IN BED ON SATURDAY MORNING,AND SAID OUT LOUD."WHY DID I NOT TRY A NOID LIGHT TEST" THIS WAS NOT AS IMPORTANT TO MY WIFE WHO THINKS I AM NUTS ANWAY, BUT I TRIED A NOID TEST WITH JUST MY SINGLE INJECTOR NOI...	19
	2004 Chevrolet Silverado 1500 5.3L transfer case VIN: 1GCEK19T84 Thanks everyone who replied to our problem. There were no troublecodes, we pulled the speed sensor wire on the transfer case to force a code, erased the code with the Modis & the transfer case started switching properly. What was wrong we don't know but it's w...	6
	1996 GMC K3500 Sierra SL 6.5L No Start, Stall VIN: 1GTHK33F8S Thank you to all who replied...as it turns out I found the problem by accident... I tried an old trick..I rapped on the back of the injector driver with a screwdriver handle and the problem went away...so we replaced it with a new one and so far the vehicle ha...	13
	1993 Pontiac Bonneville SSEi 3.8L No Start VIN: 1G2HY5211P was able to find the hidden relay which sucked to get at. jumpered relay and car still stalled. bypass cylinder with resistor and didn't fix it either. ended up to be the vat module behind glove box. wasnt planning to take dash apart so had someone make a bypa...	17
	1995 Pontiac Grand Am SE 2.3L Stall VIN: IG2NE55D5S thank you all so very much the tcc solenoid was the fix you all are very great i love this place thanks	12
	2001 Pontiac Sunfire SE 2.2L MIL Lamp on VIN: 1G2JB12F02 Checked resistance of knock sensor and it was zero. Knock sensor on order. Thanks to all who responded. Special thanks to Jay from Texas who said to look up 2002 Sunfire instead of 2001 and Christopher from Pennsylvania who listed the criteria for testing the ... Trouble codes: P0327 (Knock sensor low input).	5
	1999 Saturn SC2 1.9L No Start, Poor Idle Quality, Hesitation, Stall VIN: 1G8ZH1278X Thanks to all that replied. it turns out it was the coolant temp. sensor. even though there was no weird readings on the tech 2. or anything. Just took the sensor out and the tip of it was broken.	16

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