GM Automotive Technicians Technical Discussion and Fixes for Feb 14, 2006 - iATN (Members Only)

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Open Help Requests for GM

	Help Request	Answers
	1989 Buick Century Custom 3.3L Surge, Cuts out, Stall VIN: 1G4AH51N1K Hi techs, i hope some one has an answer for this one. this buick seems to only act up for the customer. she says that it stalls when putting into gear, and when pulling out. it will only act up when it is cold. she says it also surges when coming to a stop som...	View
	1968 Chevrolet camaro 250CID Misfire VIN: 123378N439 Questtion does anyone know the point gap spec,dwell and timing specs thanks in advance.	View
	1988 Chevrolet Caprice 5.0L No Start, Poor Idle Quality, Hesitation, Stall VIN: 1G1BN51H0J Car came in as no start suspected T-chain. Checked dist timing with TDC mark, lined up checked chain slack, at most 5 degrees. R&I spark plugs and burnt fuel off. Engine tries to start loosened dist and rotated. Engine starts, ran to operating temp and disconn...	View
	1992 Chevrolet Cavalier RS 2.2L Cooling Systems VIN: 3G1JC1141N hi guys got one here that i am just needing some in put.we have this car that we did a head gasket one and a half years ago.came back with a leak at the same place as before at the corner, we did ck the head and put new head bolts on all these jobs.we have had...	View
	1993 Chevrolet Lumina Euro 3.1L No Start VIN: 2G1WN54TXP vehicle towed in no start, no spark, no injector pulse, codes found in computer 14,15,16,17,21,22,23,25,33,35,36,39,42,43,44,45,53,54,64,81 ,87. tps voltage 1.02, coolant temp. -40, map temp -40, spark advance 6611 deg., battery volts 0. check all power & grou... Trouble codes: 14 (coolant sensor high temp), 15 (coolant sensor low temp), 16 (system voltage high), 17 (camshaft sensoe error), 21 (tps voltage high), 00 (plus other codes)	View
	1995 Chevrolet Cavalier 2.2L Stall VIN: 1G1JC5249S Hello!!! This vehicle will stall when warms up and not restart until cold. Put snap on scanner to check for DTC's and found 27-Quad driver fault. Customer himself has replaced engine controller(pcm), coils and ignition module. Was wondering if I could get some... Trouble codes: 27 (quad driver fault)	View
	1997 Chevrolet C-Series Kodiak C7H042 6.0L right tank not pumpi VIN: 1GBJ7H1PXV I hope someone can help I have truck that has dual tanks and I am not getting power to the right tank, the fuel is fed to the tbi unit from the left tank, i have no access to data to trace the circuit. I would be very appreciative for any help in the right dir...	View
	1999 Chevrolet Tahoe 5.7L ABS Module, Speed sensor VIN: 1GNEK13ROX This vehicle has a weird problem. Every once in a while, mostly at freeway speed, the vehicle will Buck/Jerk once. The customer thought it was a transfer case problem, and we had our trans. shop check it out.They don't think it is the tranny, or transfer case....	View
	1999 Chevrolet Malibu 2.4L module VIN: 1G1ND52T6X This vehicle has an ABS light on. We had a code for the LF wheel speed sensor but when we went to scan the sensors on a road test we noticed the 12 volts signal on the ABS module would start at 12 volts and then steadly drop to 2.5 volts. It will do this every...	View
	2001 Chevrolet Malibu 3.1L dreveability VIN: 1G1ND52J71 approximately once a day problem occurs, when slowing down, dash lights and all accessories drop down, abs light comes on, after accel, all is back to normal, abs light goes back out, was not able to duplicate.	View
	2002 Chevrolet Malibu LS 3.1L LF suspension VIN: 1G1NE52J62 Vehicle came in with knocking noise 2 days after replacing the brg found a bulletin relating to a suspension noise and retorque lower control arm bolts. still there replaced strut cap, lower comtrol arm and the wheel brg again noise seemed to go away after the...	View
	1995 Pontiac Trans Sport 3.8L Warning Light VIN: IGMDU06L6S replaced wheel bearing for abs code 35 now red brake light and tcs light stay on code 86 present no fualts found	View
	1997 Saturn SL2 1.9L Head VIN: 1G8ZK5279V Customer states he has to add coolant to vehicle every 3 or 4 weeks. Also states he sees smoke in am when starting vehicle. I inspected vehicle for coolant leaks none found. I was checking the spark plugs when I noticed coolant around the # 4 spark plug hole. ...	View
	2002 Saturn Vue 2.2L Rack/electronic steering VIN: 5GZCZ23D92 I am trying to determine the source of a clunk that is steering related. The customer complained of a noise from the steering that they notice with slight steering movement, such as when moving steering slightly when compensating for dips in road. I verified t...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1994 Buick Century Special 3.1L shifts poorly VIN: 1G4AG85M5R The FIX was to replace the VSS pigtail harness, as some suggested. I saw nothing wrong with the wires until I cut open the harness, and white dust came out. Black death totally ate the copper strands. To recap, I had a CEL, PO501/502, a dead speedometer and a ...	11
	2002 Buick Rendezvous CX 3.4L security system VIN: 3G5DB03E22 Hello group, This vehicle is now fixed.After reviewing all body control scan data,all switches showed normal with no change when problem occured.It got where it would act up quite often while I was checking things out.After carefully monitoring all switches ...	3
	1993 Cadillac Seville STS 4.6L abs VIN: 1G6KY5290P THANKS guys for all your help most of the tech tips were all good and it was a hard one . it turned out to be a broken wire at the abs motor on the harness by the the left side fender . LIKE i said this one finished me off. thanks again Ramond and the rest of ...	5
	1963 Chevrolet C10/Pickup .0L Steering VIN: 3C144S1385 Thanks to Kenneth [...] I figuno missing peices in the column. The three screws that hold the turn signal switch needed to be tightrened all the way. If you need info on engine size on old chevy trucks go to stovebolt.com. An excellent resource.	9
	1994 Chevrolet K2500 Cheyenne 7.4L lock up VIN: 1GCGK29N5R received 10 replies. 7 of them were correct. it was the distributor. replaced complete distributor with #1103952. this part comes from the performance parts catalog. i don't know why it is not listed in the regular service parts guide. if you just go by the vi...	10
	1995 Chevrolet S10 LS 4.3L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 1GCDT19Z3S I'd like to thank all those who responded, the information contained in your replies was invaluable. Sure enough the EGR valve was stuck wide open. Tried to clean it but the valve still stuck. After new valve and screened gasket were installed truck ran like a...	22
	1997 Chevrolet Cavalier 2.2L Misfire, MIL Lamp on VIN: 1G1JC124XV You GM Techs are the best. I put the new set of plugs in, and misfire was still random with more misfires on start up on #2 cylinder. Replaced the Installed NAPA injector with an AC Delco and problem went away. As far as the compression weak on #3 cylinder, ha... Trouble codes: P0300.	33
	1997 Chevrolet K3500 Cheyenne 5.7L Rear VSS VIN: 1GCHK34R8V We received 4 replies on this vehicle, however the actual problem ended up being something other than the suggestions. Most of the responses aimed back at the front sensor issues that these suffer from. We've seen plenty of those ourselves, and initially thoug...	7
	2001 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY22G81 Thanks to all that replied. As noted in my update the air by-pass valve was bad. We have not seen the vette for a couple of weeks now, so knock on wood it is fixed. Thanks again to everyone. Trouble codes: P0410.	9
	2001 Chevrolet Silverado 2500 HD 8.1L convertor VIN: 1GLHK29GX1 The truck is finally fixed. After checking and re checking too many things to list. The final culprit ended up being a drain plug installed on the reman torque converter. The drain plug was positioned between the raised ribs on the converter cover. These ribs ...	2
	1999 Oldsmobile Intrigue GL 3.5L Misfire, MIL Lamp on VIN: 1G3WS52H8X all of the help replies suggested problem with coils causing modgule failure - they are one in the same.both modgule and coils got replace at same time. did offer customer injector cleaning he is thinking about repair option as suggested by one reply. if this ... Trouble codes: P0300.	3
	1997 Pontiac Sunfire GT 2.4L engine noise VIN: 1G2JD12T5V Thanks for all the replies. we decided to run the engine in the shop for a while and then to take it for a long roadtest. when we returned the noise was almost gone, it could only be heard at high rpms. the customer wanted to take it the way it was we feel tha...	17
	1998 Pontiac Trans Sport Montana 3.4L Electronic VIN: 1GMDX03E1W Sorry it took so long. Customer brought back van. First let me thank everyone that helped. I cleaned fuel injectors and egr valve. No change. Replaced fuel filter. No change. Installed new fuel pump. It finally got better. Not as much of a surge. Flushed trans...	8
	1994 Saturn SL1 1.9L Oil pressure VIN: 1G8ZH5596R Hello, Well unfortunatly I cant say much on a fix for this critter. It was losing its engine oil prime overnight. We were going to try replacing the oil pump gears and relief valve, but the relief valve took a long time to come and sales sold the car before ...	6

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