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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 30, 2004
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Limited 3.8L PWM Valve VIN: 1G4HR52K8V
Hello all, I have a 4T60E in a 1997 3.8 Buick that I have just installed a sonnax TCC regulator repair kit in the valve body. I did not use the small OEM spring as the kit said it was optional. I also installed a new PWM solenoid, not OEM but made by "TeckPak...
1994 Cadillac Seville SLS 4.6L Poor Idle Quality, Hesitation, Surge VIN: 1G6KS52Y5R
We installed new electronic control module, camshaft sensor & both crankshaft sensor. Cannot find any shorts in wiring. Installed new ignition wires & spark plugs. Trouble codes: P0023, P0083
1997 Cadillac DeVille 4.6L Instrument Cluster VIN: 1G6KD54Y4V
Hello fellow techs I need some help with this problem. Customer states that the instument cluster went out all of a sudden while driving down the road. My testing shows no communication with any on board computer. I used my snap on scanner and also tried enter...
1998 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD54Y2W
missfire @ idle with a/c on.all cyls affected.this at times is intermitent.what am i missing.please help. Trouble codes: P0300
1991 Chevrolet C1500 Cheyenne 5.0L No Start VIN: 1GCDC14HOM
Gentlemen: need some help, this truck is making me crazy. As I said came in 4 days ago no spark or pulse, easy changed ign module, out she went. Came back today no spark or inj pulse again, tried another ign module--no good, after much testing of powers & grou...
1995 Chevrolet Camaro 3.4L No Start VIN: 2GIFP22S5S
One of my technicians has been losing hair over this car all week and would love if some of you could help out. This vehicle came to us with an intermittent long crank and no start condition. after a few tries will fire and run great with no other symptoms or ...
1995 Chevrolet G30 Hi-Cube 6.5L Stall VIN: 1GBHG31Y3S
we replaced the engine on this van with new GM crate engine due to excessive overheating.after install van runs well but has a stalling problem if revved in neutral or while driving and coasting.we did not have a timing meter to set injection pump to exact spe...
1999 Chevrolet Express 3500 5.7L Hesitation, MIL Lamp on, BACKFIRES INTAKE VIN: 1GAHGS9R2X
new tech getting old techs x's on acc van falls on its face the hotter it get the worse it gets but does it all the time but once it gets up to speed it runs good it also back fires through intake when acc fuel press good all the time and getting o2s down in t... Trouble codes: P0151 (ho2 ckt low volts b2s1), P0157 (ho2 ckt low volts b2s2), P0137 (ho2 ckt low volts b1s2), P0131 (ho2 ckt low volts b1s1), P0730 (incorrect gear ratio)
2004 GMC Savana 2500 6.0L Misfire VIN: 1GTGG25U44
We are having a problem with not only this vehicle, but two more 2004 GMC Savana's in our fleet. The driver comes into shop with check engine light flashing and say's it is running rough. We plug Modis in to get code's and it's PO300 Random misfire. Go to Misf... Trouble codes: P0300
1986 Oldsmobile Cutlass Ciera Brougham 2.8L hard start VIN: 1G3AM19W9G
hello all you gm guru's. i have this cutlass cierra that has an intermittent hard start issue. 90 percent of the time this vehiclestarts right away. on ocassion when starting this beast, it will crank for 5 to 15 seconds with out starting up. will pop and sput...
1986 Oldsmobile Custom Cruiser 5.0L Low Power VIN: 1G3BP3578G
C/S after I reseal the reman carb top plate and after new GM engine had been replaced car ran great for 3 weeks. Then C/S one day car made loud grinding noise under air cleaner area and gradually the noise wnet away the same day. Since then fule milage is terr...
1991 Pontiac Grand Am Value Leader 2.5L Poor Idle Quality, Cuts out VIN: 1G2NG14UXM
Plugs and wires changed, have checked coil packs, crank sensor, TPS sensor, ign module, EGR valve. Unplugging vacuum from EGR & capping hose improves situation but not totally, & instigates check engine light & EGR code.
1998 Saturn SL2 1.9L No Start VIN: 1G8ZK5276W
Hi group, this saturn cranks but does not start, it back fires and kicks back while cranking, I have replaced plugs and added oil to bring back the compression and also disconnected the injectors for a while to clear cylinders. (but no change)If you disconnect...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Regal Limited 3.1L starts then stalls VIN: 2G4WD14T3K
thanks everyone for your help. i checked powers and grounds at the computer and all were ok. replaced computer car now runs fine.good thing the car owners brother runs the local junkyard. i was able to get a used one. thanks everyone again who helped. Trouble codes: 22 (tps low).
1994 Cadillac Eldorado 4.6L Excessive Emissions, Misfire, MIL Lamp on VIN: 1G6EL12Y9R
Thank you to all that helped, it was actually fixed2 days ago but we held it to make sure it was fixed. As stated above it had a misfire on take off acceleration. i removed the intake cover and found what seemd like oil all over the intake, i ohm out all the i... Trouble codes: P0076.
1990 Chevrolet Astro 4.3L rear doors VIN: 1GCDM15Z1L
Hello iatn friends, Thanks for all your inputs. I ended up trying first heated up the hinge on the wrecking yard door to pound out the old pin. It sure burn up the paint more than I like. So I try remove the damaged door by cutting a slit along the top part of...
1993 Chevrolet C1500 Cheyenne 5.7L Cuts out VIN: ZGCEC19K7P
Thanks to all that helped out on this one. Turns out the distributor was the problem. Apparently, the pickup magnets begin to lose their strength over time. Special thanks to Kirk for 'walking me through this one'. Other suggestions were to clean and check all...
1993 Chevrolet Camaro Indianapolis 500 Pace Car 5.7L Poor Idle Quality, Misfire VIN: 2G1FP22PXP
thanks for the help ! firing order was correct(same as lt1) , new spark plug and unplugging knock sensor helped.(new rockers noisey , pcm was retarding timing)lt4 uses a knock module to compensate for noise.
1997 Chevrolet C2500 5.7L pressure readngs
First of all thanks to all 18 people who took the time to respond to my post. Sorry for long delay in posting fix, has some MSN issues... Anyway to answer many responces, I beleive I may have had lines on backwards. And yes, truck was wrecked about 2 years a...
1998 Chevrolet Cavalier 2.2L ecm & ecbm VIN: 3G1JC5243W
Replaced ABS Module & all is well. Thanks to all who responded!! Can't say enough about this group.
2000 Chevrolet Malibu 3.1L Poor Idle Quality, Surge, Stall VIN: 161NE52J1Y
The information I recieved was very helpfull. I noticed that on cold start the vehicle idled very well in open loop. I recieved a tip to recheck the oxygen sensor. Upon rechecking the sensor hot in closed loop (by introducing carb cleaner through a vac. port) ...
1997 Oldsmobile Silhouette 3.4L Vent Air Temp VIN: 1GHDX06EXV
Group, Apparently having computor grief, I have tried to close this post twice. The silhouette van with a single AC cools to within the parameters of GM bullitin#00-01-38-007 sepr 21 2000.We installed 2 (delco,delphi) compressors, 2 evap cores(chinese,delco ) ...
1999 Oldsmobile Intrigue GLS 3.8L lt side outlet temp VIN: 1G3WX52K4X
I Yi Yi!!! This thing should have been fixed 2 weeks ago! Original diag. of bad actuator was correct, tech did not check for proper part. We finally got the correct actuator(drivers side blend door)& are happy. A Tech2 or mastertech really are helpful to ping ...
1998 Pontiac Grand Prix GTP 3.8L fuel related VIN: 1G2WP5211W
well as of this posting the car has not been back ,all we did was dis-connect the park brake switch. my feeling is the bcm is commanding the injectors to turn off.i think when the car comes back in i am going to try and re-configure the bcm.
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