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Prev Professional Automotive Repair Technical Discussions for August 6, 2008
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Open Help Requests for GM
Help Request Answers
1989 Buick Regal Custom 3.1L Stall VIN: 2GC4WB14T3
Hello again everyone. This car was hardly driven. Only 30k miles. I have a problem with this car stalling when you put it in gear. I am leaning towards a problem with the ecm but would like some opinions/experiences before I change anything. The only thing I n...
1999 Cadillac DeVille 4.6L cooling fans VIN: 1G6KD54Y0X
vehical came in for ac inop, well it had the ses light on & customer stated ac quit working & the light came on,it has a po1660 cooling fan circuit code present.further more i saw the high side temp. at -40 deg. which i thought could be why he lost ac, well wh...
2002 Cadillac Seville SLS 4.6L mil lamp never on VIN: 1G6KS12YGE
car came in and failed smog test.mil wont light for bulb test.ignition fuse #1 powers mil.found fuse good and power too it is good.I want too next take out mil bulb and replace with known good one for next test.the question is how do I take out the instrument ... Trouble codes: P0410
1992 Chevrolet Lumina Euro 3.1L Cuts out, Stall, Misfire VIN: 2G1WN14T0N
Hello all... Thank you in advance. This car comes in the shop and when warm it starts to sputter, misfire, cut out and all kind of crazy things.j I Scan for codes no codes at that time but my scan data was ready all crazy (IE; 15,000 RPMS coolant temp 400 degr... Trouble codes: 42 (EST Problem)
1993 Chevrolet K1500 Cheyenne 5.7L Excessive Emissions VIN: 2GBEK19K4P
Thank you in advance for your help, This truck has an o2 sensor circuit that will not get near 800mV no matter how rich I make the fuel mixture. I disconnect the harness and connect one hand to the battery positive and the other hand to wiring harness going to...
1995 Chevrolet Lumina LS 3.1L Poor Idle Quality, Stall, Misfire VIN: 2G1WN52M5S
hi guy's thanks again for your time. car came in with stalling and miss complaint.scanned comp no codes watched pid data (genisns junk scanner) cam signal at 8-9 running 200 at cranking. same with senser on fender. so i tried new sensor same results. checked w...
1999 Chevrolet Cavalier 2.4L ABS system VIN: 8Z1JE12T0W
This particular cavalier Z24 sets the DTC C1295 Brake Lamp Circuit open only with KOEO and KOER when the hazzard lights switch is turned on. However, if brake pedal is the is depressed the DTC does not sets, but if the pedal is released it sets right away, bes...
2002 Chevrolet Trailblazer LS 4.2L Vehicle ID info VIN: 1GNDT13S92
This one is crazy...no symptoms, no issues; BUT- when I put my Tech-2 on this vehicle, there is no VIN stored on the PCM - but the vehicle starts. All communication to other info on the PCM and all other modules is fine. When I try to re-flash the PCM with the...
2004 Chevrolet Silverado 2500 HD 6.6L Cuts out VIN: 1GCHK29224
I need help from you GM diesel techs!!! I am not familiar with these duramax's at all. This truck has been at the dealer for the past week and they have not been able to figure out what is wrong. The best way I can describe what is going on is under heavy acce...
2005 Chevrolet Trailblazer EXT LS 4.2L MIL Lamp on VIN: 1GNDS13S25
vehicle came in with mil on, code p0410 set. checked secondary pump operation, runs fine, ran test and front o2 sensor was sluggish after rpm increase, replaced sensor. drove car and it passed code test. mil came back on, took 26 miles to set a failure, rechec... Trouble codes: P0410 (secondary air injection system)
1993 GMC K1500 Suburban SLE 5.7L a/c controller VIN: 1GKFK16K0P
The truck was in a month ago with a/c controller blank and inoperative and after getting it working and repaired the cust has come in again and the a/c controller was blank and inop again so I unplugged it and reconnected it and it works again. A GM tsb for th...
2007 GMC Envoy Denali 5.3L ride control VIN: 1GKET63M97
hey guys i am a tranny guy so this suspention stuff is new to me.this is my car,a few days ago my rear suspention hit bottom.the compressor isnt comming on like it use to.the light on the tire inflator is blinking not a code just a steady blink.everything is p...
1997 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 1G2HX52KXV
i replaced the engine with a used engine out of a 99 grand prix. i get the light on code po1133 one time. then the next time it comes up po0133. i have changed the o2 sensor from the old engine and also now have a new o2 sensor installed. i have checked the gr... Trouble codes: 1133 (o2 sensor before converter not switching fast enough), 0133 (same as above)
1999 Pontiac Bonneville SE 3.8L freon loss VIN: 1G2HX52K2X
i can`t for the life of me find this d***#@&* leak.the sys looses between 8oz. and 1lbs. over night.i have dye in it.find no trace of dye anywhere.i have removed the relay center and the blower resistor and see no evidence of a leak. no dye,no oil stain on thi...
2001 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T21
2002 Saturn SL1 1.9L No Start, Stall VIN: 1G8ZH52802
Help needed from Saturn techs. This vehicle arrived as a no start. The vehicle security light is flashing with key on and when attempt to start it will fire on prime pulse but shut right down. The only code retrieved was a 1599d code for stall detected. The ke... Trouble codes: 1599 (stall detected)

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Regal Gran Sport 3.8L emergency brake VIN: 2G4WD54L6M
we recieved two bad rebuilt calipers. we put on a dorman unit and it worked properly. The racheting part of both rebuilt calipers did not work. Thanks to all that replied.
2002 Buick Century Custom 3.1L Hesitation, Surge, Cuts out VIN: 2G4WS52JX2
I Replaced ignition module to repair the vehicle. Problem only was happening when car got hot. Module repaired it. Thanks for the replies.
1992 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCDC14Z5N
Thanks for all the help! Learned a good bit from all the replies. The fix ended up being a simple one. Installed new distributor and this triggered my injector pulse width to a much higher reading than the low of 1.8 to 2.0 milliseconds of pulse width. As I...
1994 Chevrolet C60 Kodiak C6H042 6.6L pressure plate VIN: 1GBG6H1J6R
Well, Customer is taking vehicle to do some gravel runs with it and see how it goes. If not acceptable, I will then remove and replace clutch again with gm parts along with flywheel. Thanks to all that replied. Ill try to update you in the next week on the out...
1999 Chevrolet Corvette 5.7L Wipers VIN: 1G1YY32G3X
Wiper control module was exposed to lots of water. replaced and all is well. Thanx everyone for your help
1999 Chevrolet Camaro Z28 5.7L trip odometer VIN: 2G1FP22G0X
Problem solved. After getting a copy of the tsb and removing the ipc from the vehicle to read the pn#, we learned we had an ipc that was listed in the tsb. A new updated ipc was installed and a friend showed up with his Tech 2, and the rest is history. Thank...
2001 Chevrolet Express 1500 5.7L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 1GBFG15R51
Well guys it`s a fix. First sorry to close so late, I just wanted to make sure the van was well & truely fixed. All replys were appreciated. Basics like voltages, vac leaks, plugged exhasust, etc were mentioned & double checked. Ryan [...] hit the nail on t...
2002 Chevrolet Blazer LS 4.3L engine VIN: 1GNDT132K2
I replaced the fuel pump, drove around 25 miles during 105 f. outside temp. Vehicle died when i was almost back to the shop. Replaced Icm & coil drove again the next afternoon (again 105 f.)put around 50 miles on vehicle. Did great, gave back to department, so...
1997 Pontiac Sunfire SE 2.2L lack of power
well everyone sense I cannot update any more information only once, i guess i have to close it, i did notice my egr is working correctly can operate it by computer. my fuel pressure is good 45-50 pounds at idle.
2000 Saturn LS2 3.0L No Start VIN: 1G8JW52R4Y
Thanks for the replies but I couldent wait for more replies so I put a gauge on the test port and one on the line to the return line to the fuel tank with a shut off valve on both gauges shut both off while car was runnig and shut car off at same time. I found...
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