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Prev Professional Automotive Repair Technical Discussions for December 14, 2009
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Open Help Requests for GM
Help Request Answers
2000 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J3Y
After 3-4 days of driving, these codes are set & find that the o2 heater fuse is blown. Replace fuse, clear codes & all is well for another few days. Looked for chaffed wiring, found tsb for harness rubbing on accumulator, but nothing there. Any common areas t... Trouble codes: P0133, P0135, P0141
2000 Cadillac Escalade 5.7L p/s VIN: 1GYEK13R2Y
Alright cadi guys, where you at. The vehicle came initially with the complaint of no p/s. Performed visual inspection, leak tested, verified complaint - leaking from pump seal. Replaced the p/s pump, transfered the evo solenoid, installed new o'rings. Let vehi...
1994 Chevrolet Blazer 5.7L No Start VIN: 1GNEK18K1R
I have a cranks no start problem that just happened all of a sudden the truck has been running fine i used it to move a trailer and parked it. I went back out to use it and it wont start. There is spark and you can hear the fuel pump come on. Hooked up the sca... Trouble codes: 33 (MAP sensor circut high), 35 (IAC error)
2002 Chevrolet Express 2500 5.7L No Start VIN: 1GCGG25R12
van came in on hook will not run checked it out no codes, it would back fire and carry on like it was out of time and not start, found cap in bad shape, replaced cap and rotor still same thing, replaced coil still no help, replaced plugs and it fired up but wa...
2005 Chevrolet Colorado Z71 3.5L electric windows VIN: 1GTJDT1362
drivers window not working, all other windows workin fine from master switch, all other door switches are fine, any known fixes would be greatly appreciated
2006 Chevrolet Trailblazer EXT LT 4.2L po894 VIN: 1GNET16S26
This trailbalzer is setting PO894 randomly. I have had it and reset the code and drove it for a week and it did not reset. the customer took it on a 4 hr trip and says the light came on when exiting the freeway. He states he never feels any issues with the way...
1995 GMC Sonoma SLE 4.3L Excessive Emissions, Hesitation VIN: 1GTCS19WXS
Vehicle came in, cust stated vehicle would not go above 30mph with headlights on. After testdrive cust complaint was verified. Seemed like the truck would load up, and wouldnt downshift or anything. With headlights off truck ran normal, Checked charging system... Trouble codes: P0340
1998 GMC Safari SLT 4.3L blower high speed VIN: 1HKEL19W7W
The vehicle keeps burning out the high speed wire to the blower. All the other speeds work and don't have a problems. My friend has replaced the above mentioned parts twice and it only lasted a week this last time. I haven't looked at the van yet but the plan ...
2001 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NE52TX1
Car came in fro MIL on . Rear O2 heater dead , and po1336 codes . Replaced o2 sensor , cleared code. Still have po1336 code . I can't get car to relearn . I go through proceedure . Key off, key on , foot on brake , start engine . Accel to 4000 rpm , enigine do... Trouble codes: P1336
2006 Pontiac GTO 6.0L cluster VIN: 6G2VX12U56
this one is an on going problem. i have had the red brake light come on in the cluster for this, have disconnected the parking brake switch and the brake fluid level switch and the light still stays on. found a bulliten for the connector on the pass side kick ...
2001 Saturn SL1 1.9L Check engine light VIN: 1G8ZF52841
This saturn came in for a used computer flash. We flashed the computer and sent the car down the road. After a month, it came back in with a check engine light. The codes were a P1635 5 volt reference signal and a P0327 knock signal low and a crank relearn fau...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Chevrolet V30 Custom Deluxe 7.4L Excessive Emissions, Poor Idle Quality, Surge, Stall
Customer finally brought in old distributor. Bad pickup coil and cracked magnets. Swapped the module from the bad distributor to the new distributor and engine ran better wouldn't die out anymore and I could give it gas as well. I did this only to find out I w...
1997 Chevrolet Cavalier 2.2L Stall VIN: 1G1JC1245V
As noted before, we replaced the ignition switch, which I am sure was going bad, but that did not change anything. Someone had mentioned a broken wire between injectors 2-3. We ended up finding a broken wire right at the 5 wire connector at the trans end of th...
1999 GMC Jimmy SL 4.3L transfer case VIN: 1GKDT13W7X
Well dang'it here's what happened. Continuned testing a day or to later. Found mode swt to be in spec, ck'ed wire integrity from module to swt, and module to motor, all Found to be good. Did find greenie meanies at TCCM connector, pulled terminals, cleaned and...
2001 GMC Jimmy SLT 4.3L transfer case VIN: 1GTDT19W81
Thanks for those that responded. After checking all the vacuum hoses and axle switch and finding nothing wrong I located a schematic. The tranfer case motor gets current through ATC 20amp fuse. Checking the fuse I found it blown. I replaced the fuse and the un...
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