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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 29, 2006
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L Starting VIN: 1G4CW52KXW
After my alternator fiasco I have a vehicle that when it chooses will not crank. I was able to go to the customers house and put my meter on the solenoid wire and determine that it was not getting current. I have no codes related to theft deterrent in PCM or B...
1993 Chevrolet Corvette 40th Anniversary Edition 5.7L pressure switch in master cylinder VIN: 1G1YY23P2P
we first came in contact with the vehile at 111,432 miles. the customers initial complaint / request was that the car shakes and hesitates under load and there is a heavy vibration when brakeing. we corrected the engine performance issue with a new distributo...
1994 Chevrolet K1500 5.7L Excessive Emissions VIN: 2GCEK19K1R
This truck came in with a failed emissions test and cust did not want diagnosis, just wanted cat replaced due to rattle. Now 2nd test failed for high idle HC (same as first test) and I get it. No codes present and truck runs great with no drivability issues. I...
1996 Chevrolet Blazer 4.3L transmission area VIN: 1GNDT13W1T
there is a noise sounds like static, when sitting still in park, you can hear it inside the cabin, noise changes if you press accelerator pedal slightly, has anybody heard this noise before. it sounds like you left the radio on, but its not on help
1996 Chevrolet Astro 4.3L Surge, Misfire, fish bite VIN: 1GNDM19W2T
Thank you freinds, This astro has been a test to my patience. About a month and half ago this vay came in from another shop and the costomer said that they had replaced the fuel pump but no filter change. Vehicle had 47psi and I found the filter totaly restric...
1998 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 1GCEK19R0W
we installed new fuel pump and fuel filter we are getting power to the pump but it does not work tried another pump still does not work relay and fuses are good
2000 Chevrolet Express 2500 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCFG25R2Y
Engine continues to misfire and set the P0300 DTC. Cylinder four misses the most then cylinder eight then cylinder two and then cylinder six. Misfires are only on bank two. Check for vacuum leaks and repaired a 7/32 line on bank one at PCV valve. No other vacu... Trouble codes: P0300
1993 Geo Tracker 1.6L Excessive Emissions, Poor Fuel Economy VIN: 2CNBJ18U8P
this thing is running rich . i had replaced the o2 sensor the old one said it was lean. .054 mv. now the new one averages at 889 mv. which makes sence but what doesent make sence. is the fuel trim short & long term dont move they are fixed at 128. i also am cu...
1990 GMC K1500 Sierra SLE 5.7L Unknown VIN: 1GTDK14K7L
hello fellow techs.i have this 90 gmc pickup with rwal.have looked in archives but don't see any thing that looks exactly like my problem.the truck has a good pedal not spongy,but brakes don't grab well.feels something like a power booster thats not working. b...
1989 Oldsmobile Delta 88 Royale 3.8L Misfire VIN: 1G3HY51C5K
vehicle came in with running rough (worse when cold), stalling when put in gear. we confirmed allof this. fortuneately we have a tech with an identical car to test parts with. the engine sounds like it has retarted timing but no distributor application.suspect...
1995 Oldsmobile 88 Royale 3.8L motor swap VIN: 1G3HN52K75
I'm doing a motor and trans swap.The scrap yards are telling me it should work. What i have is a motor and trans out of a 95 park ave. non supercharged vin L and the 88 is a vin k. I can see the intake ,exhaust ,and timing cover are different is that it or is ...
1996 Pontiac Grand Am SE 2.4L catalyst monitor VIN: 1G2NE12T3T
hello everyone , hope you can direct us to a repair or info on how to determine a solution to a catalyst monitor that wont run . vehicle came in with 4 codes , rear o2 slow, cat low efficiency, knock sensor activity , rich bank 1, weve got it all repaired and ... Trouble codes: P0420, P0172, P0325, P0139

Fixes & Summaries for GM
Fix/Summary Answers
1979 Cadillac Eldorado 5.7L Hesitation, Stall VIN: 6L57B9E605
Thanks to all of you who replied, especially Bill [...] for the factory manual. This Caddy had multiple problems. The throttle position switch was bad: sometimes it would click the injectors 17 times when operated, sometimes not at all, never 21 times like it s...
1993 Chevrolet Cavalier RS 2.2L Poor Idle Quality, Surge VIN: 1G1JC544XP
As many of you that had responded and had the wonderful expirience of dealing with these fuel injectors, bravo! We had a combination of 2 Rochester Product injectors and 2 others. When looking at them closely in an FI testing machine, the RP's had a nice conic...
1995 Chevrolet Corsica 3.1L Battery VIN: 1G1LD55M9S
Thanks to everyone who responded. They were all necessary to convince me that a .2 amp draw was the key. Right on with the OE radio clock. Too many circuits powered by the radio fuse made it necessary un-plug at back of radio (a five minute job). Magic 0.0 amp...
1995 Chevrolet Blazer 4.3L Poor Idle Quality VIN: 1GNDT13W8S
Thanks to the 14 people who took the time to help me. The trouble was the pressure regulator. I turned on the key and after about 10 seconds the regulator started to drip gas.[The wife is very happy and so am I.]
1997 Chevrolet Lumina 3.1L No Start VIN: 2G1WL52M3U
Found wiring at ignition switch chaffed. It did not blow fuse. Replaced ignition switch and wiring. Thanks for all of your help. Trouble codes: P1626 (fuel shutoff.....theft system).
1998 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GBEC19R4W
thanks to all bill andrew bob petros joseph. customer pick up truck and he still drives with mil on. i retry all advices with no solution. he needed the truck.he will bring it back in few weeks when new truck comes. thanks to all.milton Trouble codes: P0171, P0174.
1999 Chevrolet Silverado 1500 5.3L Differential VIN: T6X1508555
Thanks guys for all the help, after many calls & researching we found that the gears were boxed wrong & so guys LOOK OUT!!! THE DEALERS are insisting that they will fit, but they dont. here is the part# [...] for the right gears. Thanks Brian
2005 Chevrolet Silverado 2500 HD 6.6L Rear Tires VIN: 1GCHK29235
well i will call this one fixed I ended up puting on new E rated michelin tires and recheked the Alimint I whanted to what to close this request so the guy could put some miles on the truck he has around 8,000 miles on it now and I could harly see any difrense...
1992 GMC C3500 Sierra 7.4L excessive exhaust te VIN: 2GCHC39NXN
we ended up putting on spark plug boot heat sheilds it has been a couple of days since it left have not heard back from customer so i am hopping that is a good sign thanks to all that responded
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