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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 7, 2006
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L No Start, Stall
I got this car last week, came in with a stall hot cosern. So i varified the problem, it did indeed stall after 15 mins, checked for codes non present. So tried to start starts right back up, stalls 2 mins later, starts right back up. Then it wouldnt stall, ra...
1991 Cadillac DeVille 4.9L Electronic VIN: 1G6CD53B8M
I had posted an earlier help request about this same vehicle. I figured that problem out. This vehicle has an intermittent blower motor. Once the blower is working, it will work fine until the key is turned off. I then turn the key back on and it won't work. I...
1992 Cadillac DeVille 4.9L water pump bolts VIN: 1G6CD53B9N
The water pump has been replaced many times.Now some of the 6mm bolt holes are stripped in the block.I don't have any way of installing heli-coils in the block.I don't know if a standard {fractional} bolt will fit and work in place of the metric bolt. Does an...
1994 Chevrolet S10 4.3L flywheel VIN: 1GCDT14Z7R
Just a quick one, will a later model post 1996 flywheel work for a 1994. PN is [...]. It has 168 teeth. Thanks in advance, this is a regular customer. Youngster restoring this S-10.
1995 Chevrolet K3500 6.5L 4 WD Fuse VIN: 1GBJK34F5S
The 4 wd fuse blows whe 4 wd is engaged as soon as button is pushed. Fuse #24 blows (frt axle actuator, 4 wd Ind. LP, aux battery relay) immediately. Installed new front actuator because of ease and the brewing snowstorm and the same condition occurred. Furthe...
1996 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1245T
Car wont start intermittently, cranks over but has no spark & no fuel. When the car started the theft light stayed on several times until restarted. We had the car in the shop yesterday & no codes were set & the car would not start when 1st in shop, theft ligh...
1998 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCEC14W6W
First Id like to thank everyone taking time to offer advice. Im working on a 1998 Chev pick-up with intermittant no-start. It is a no spark condition that seems to only occur when damp or humid. vehicle will have very dim spark signal on a snap-on in line flas...
1999 Chevrolet K3500 5.7L transfer case VIN: 1GCHK33R7X
Thanks to all your help in advance. This truck grinds when putting it in 4 wheel drive on the fly at speeds above 5 mph. The grinding is coming from the front diff. If you stop it will go in and stay in fine. We have replaced the swith, actuator, collar and sh...
1999 Chevrolet Cavalier 2.2L Excessive Emissions, High NOx VIN: 1G1JC524XX
Hi guys, I have a '99 Cavalier that was sold to a customer but failed E-Test on NOx (1015ppm, limit:505ppm). HC is 16ppm and CO% is Zero. Now I do not have a 5 gas test, the car got sent out for the e-test. I have check all sensor values, the only thing that s...
1999 Chevrolet K2500 Suburban 7.4L encoder motor VIN: 3GNGK26J5X
Hi all thanks in advance for your help. This truck was blowing the 4x4 fuse intermitantlyfor customer replace the fuse and all was fine everytime. Seems to blow fuse when first start truck (unverified).Then it became a dead short that we traced to the encoder ...
1999 Chevrolet K3500 6.5L Driveline VIN: 1GCHK33F4X
This truck came to me after the local dealer blew it off stating the condition is normal. Customer complaint sever binding on turns when in 4WD. He stated recently running over a large rock by accident. inspected truck found some minor damage to LF axle shaft ...
2000 Chevrolet Impala 3.8L MIL Lamp on VIN: 2G1WF55K9Y
Greetings to all,this chevy will set a code for the evap system.I have smoked the system and all looks good as far as leaks go.I have went and tested the fuel cap and that also checks good.The code is po440 evap system,looking at the flow chart it says to chec... Trouble codes: P0440
2001 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS19541
Yhis vehicle is in for an emmision inspection but the light is on. The codes are for the fuel composition sensor but I cannot find one. My shopkey locator says its on the frame in the fuel lines. This truck does not have one that I can find. I have had the com... Trouble codes: P0178 (Fuel composition sensor circuit low), P0179
2001 Chevrolet Tahoe 5.3L Heater Performance VIN: 1GNEK13T91
This Tahoe is experiencing a lack of heater performance. Initially when vehicle came in found no matter how long the vehicle ran, the lower radiator hose (the thermostat outlet) stayed COLD at all times. At this point we put a water pump and thermostat into th...
2004 Chevrolet Suburban 2500 LS 6.0L Starting VIN: 3GNGK26U44
Hi everybody, i have this suburban 2004 model almost brand new only 297 miles the car will start and dies immediately, the electric windows & central lock are not working too, i tested engine for codes and found two: P0622 Generator F-terminal circuit, P1626 t...
1999 GMC Sonoma SLE 4.3L noises VIN: 1GTDT19X3X
this truck has an obvious humming noise coming from the cpi unit particularly the return line. it is very noticable in the cab of the truck. customer has had no running problems at all. checked identifix, iatn, two other shops, my local dealer and tsb's to no ...
1994 Pontiac Sunbird SE 3.1L Poor Idle Quality, Hesitation, Surge, Stall VIN: 3G2JL11TOR
This sunbird, with a 3.1 liter, runs good cold. once it warms and has been driven, it will surge, (occasonally stalling when stopping), it also has a missfire that will come and go. I've changed the O2 sensor due to the reading staying lean, but still fluctuat...
1993 Saturn SC2 1.9L Stall VIN: 1G8ZG1574P
Hi, We have a 1993 Saturn sc with a no idle issue. Customer bought car in because it would not idle. Immediate stall as soon as foot off gas. It was even hard to shift because idle dropped so quickly. We checked obvious basics and pulled codes. We had a code...
1997 Saturn SC2 1.9L No Start, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1G8ZH1271V
will start when cold (poorly)then will stall as soon as it starts to warm up . will not start again until it cools slightly . two codes are for cam sensor , but vehicle does not have . Trouble codes: P0341, P1351, P0351, P1599, P1624, P0340

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick Century Custom 3.1L Oil in Coolant VIN: 2G4WS52J11
After reviewing the many replies posted here, we pressure tested the radiator and found no leaks into or out of the transmission cooler. Realizing that there are no oil pressure ports into the heads, intake, or timing cover, we decided to change the engine for...
1990 Cadillac Eldorado 4.5L Poor Idle Quality, Surge VIN: 1G6FL1330L
okay, so the gm fuel pressure regulator has been discontinued, and the aftermarket units do not supply enough pressure. the customer brought the original pressure regulator in. i tapped the vacuum port to accept a 6mm bolt and capped the vacuum port. after a l...
1991 Cadillac DeVille 4.9L Electronic VIN: 1G6CD53B8M
Thanks for the replies. I had a bad connection at the bcm. It was the serial data line from the ECC. I repaired the connection and the ECC unlocked.
1996 Cadillac DeVille 4.6L Blower housing VIN: 1G6KD52YXT
Merry Christmas!, Thank you very much for your help. The part that I had requested was actually a 'barrier' for the hvac box- the flexible fiberglass and plastic cover that bolts over the hvac box, not the metal hvac case itself. Per your advise I removed th...
1994 Chevrolet Camaro 3.4L No Start, Hard Cold Start VIN: 2G1FP22S6R
The vehicle ended up being sent to a 'wonder' tech on the other side of the state. They were also unable to find soource of problem. Customer took vehicle back to his grandparents, and there it sits. I'm sorry I have no other useful info, but apparently I wasn... Trouble codes: 82 (3X Sensor Error).
1995 Chevrolet C2500 Cheyenne 7.4L Hesitation, Cuts out, Stall VIN: 1GCGC24N1S
thanks for the help,i repl the tbi with a used one and did a motorvac service and all seems well thanks again.
1996 Chevrolet S10 LS 4.3L High idle VIN: 1GCDT19W9T
Several people said to check for vacuum leaks and for the throttle body gasket being blown. I also was told to check for ground problems at the pcm. The customer has not returned for a recheck at this time. I will keep everyone posted. Trouble codes: P0122 (Tps low voltage).
1997 Chevrolet C3500 Cheyenne 5.7L Surge VIN: 1GCHC33R0V
Unfortunatly, I cant say this one is fixed at this time. My customer hasn't been able to get the vehicle back to me due to the holidays, I will be seeing it after new years. I will repost at that time if any luck. Once again, thanks for all the replies. I did ...
1999 Chevrolet Blazer 4.3L intake gaskets VIN: W8X2207871
thank you for all your replies. just like about all of you said recalabrating the hvac system fixed these two. i done so many of this intakes but have not had this happen before.
1998 GMC Jimmy Envoy 4.3L ignition switch VIN: 1GKDT13W4W
Thanks for all the help responses. The switch that everyone mentioned steered me in the right direction. It turned out that a broken wire going into the switch was the problem. Thanks again for all good suggestions. Paul
1995 Pontiac Trans Sport 3.8L Cuts out VIN: 1GMDU06L1S
Customer has not brought van back. A few responses talked about wiring to the crank sensor and also a problem with the ecm. Thanks Mike P
1999 Pontiac Grand Am SE 2.4L security VIN: 1G2NE52T9X
Thak you for the help guys. This was an easy one. I used the red brick, we could not access the bcm to clear. After using the Motis with the latest update, I was able to clear and then reset the security light. Joe.
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