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Prev Professional Automotive Repair Technical Discussions for January 17, 2011
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L No Start VIN: 1G4CW52K9S
Thanks to everyone responding to this post. I unplugged cam sensor, no start. Fuel pressure will get up to 40 psi but will drop off when stop cranking. Even though I replaced the pcm with same prom codes will not erase. ECT and MAT with in 5 deg. of each other... Trouble codes: P0703 (Brake switch circuit), P0501 (Speed sensor circuit), P0755 (Shift solenoid B fault), P1361 (Ignition Control Signal not toggling), P1619 (Engine oil life reset switch circuit), P0705 (Trans. range switch circuit)
1984 Chevrolet C70 C7D042 7.0L no crank, blown fuses and no headlams
Ok guys this one has got me about to beat my head off the wall. This truck is a volunteer fire dept truck and they installed the battery backwards and tried to start the truck. They told me they seen smoke from around the driver side headlamp when the turned t...
1995 Chevrolet Blazer LT 4.3L No Start, Poor Idle Quality, Stall VIN: 1GNDT13W4S
Vehicle came into the shop not running. Was told by a previous shop that the cpi unit was bad. A new cpi unit was installed, along with plugs, plug wires, dist. Cap and rotor. Removed egr valve to inspect for leakages tested ok vehicle will start but runs roug...
2003 Chevrolet Silverado 2500 HD 6.0L Stall VIN: 1GCHC24U83
This truck came in with complant of intermitant no power, which ment no accerator truck would only run about 30mph. When doing so you could hold pedal to floor and no rpm increace. I could not duplicate this . So customer had me change the pedal sensor and tps... Trouble codes: P125, P120
2003 Chevrolet Silverado 1500 5.3L turn signal/horn VIN: 1GCEK19T73
Please help. I have this 03 chevy 1500 that the horn will go off when the turn signals are turned on. This happens primarly when the vehicle is cold. Note customer was in a hurry I tried to remove the horn relay. However, on the otherhand found out that the tu...
2004 Chevrolet Colorado 2.8L Theft System VIN: 1GCCS19864
truck was towed in about a month ago for a start-stall problem. had codes B1442-ignition off, run, or crank circuit low, and B2957-security system sensor data circuit low. tested power for the ignition switch circuit and found the run circuit with no power out...
1998 GMC K3500 Sierra SLE 7.4L Misfire VIN: 1GTHK33J1W
Thanks in advance as always. we have a abrupt miss which occurs under different conditions on #6 cylinder. Problem appears worse with a warmed up engine but not a steadfast rule. It bucks intermittently and flags misfires on 6 with just a few on #5 when it hap...
2000 Pontiac Firebird Trans Am 5.7L Headlight lift motor and wipers VIN: 2G2FV22G6Y
Recently vehicle came in with intermittent wipers malfunction, could be set on intermittent and would just swipe like on low speed with no intermittent or would not turn on or would not shut off, or at times work a-o-k, felt it was the module that I was told i...
2004 Saturn L300-3 3.0L No Start, MIL Lamp on VIN: 1G8JL54R04
Intermittently will not start. Customer says if it starts it will run fine until shut off again and another gamble if it restarts or not. I let it sit overnight and tried only cranked at first so I held gas pedal down and it fired up. From then on it fired and... Trouble codes: P2119 (Throttle Closed Position), P2176 (Min Throttle Position), P0560 (System Voltage), P0700 (TCS Fault), P0261 (P0264 P0267 P0270 Cyl1-3 Injectors), P0458 (Evap Purge Sol)

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Cavalier RS 2.2L No Start VIN: 1G1JC5440R
Well thanks for the replies, Well I cleaned out the cylinders and spark plugs, let it set overnight and installed the plugs and vehicle started up but ran real rich for awhile. I let it set for 3 hour went to start same thing vehicle would not start and plugs ...
1996 Chevrolet S10 4.3L No MIL VIN: IGCCS19X8T
This vehicle was killing my tech he couldn’t leave it alone. He went home and spent 2 hours looking up fixes on the internet and he found Tom was right all we had to do was let the truck sit for 1 minute off and, 1 minute on for the light to reset. We thought ...
1997 Chevrolet Tahoe 5.7L high idle VIN: 3GNEK18R4G
Finally got approval for intake gaskets and guess what, it's fixed. I/we do greatly appreciate all the help. Lesson learned, dont forget the simple stuff and if you got the tools dont forget to use them. Trouble codes: P0507.
2003 Chevrolet Impala 3.4L cooling system VIN: 2G1WF52EX2
Thank you for all the great help on this one. Ended up finding a head gasket leak after doing a leak down test and seeing air in the coolant at the filler neck. Great tip, and will be one of the first test I do from now on. I am also going to invest in an airl...
2006 Chevrolet Malibu LS 2.2L starter VIN: 2G1WB58N46
Thanks for all the replies. Most are suggesting ignition switch. The battery tested ok but low and is original. We replaced the battery and sent the vehicle down the road, hopfully for good. Only time will tell.
2006 Chevrolet Monte Carlo SS 5.3L Rear Defrost VIN: 2G1WL16CX6
Started tracing my purple wire back from the grid. Eventually I got to a connector at the right front kick panel right below the fuse panel there. I pulled the connector apart and the pin was melted. Seeing as it was a 20 some pin connector I cut the wire on b...
2007 Chevrolet Express 3500 4.8L MIL Lamp on VIN: 1GCHG39V47
Thanks to everyone for all there helpful information. I am waiting on the customer to return to install and down stream oxygen sensor to see if this will help any. Trouble codes: P0430 (Catalyst System Low Efficiency Bank 2).
1992 GMC K1500 Sierra 5.7L Oil pressure VIN: 2GTEK19K3N
I've got to close this one because of the time involved. Sorry for the delay. We solved the problem I wrote about, thanks to the help of this forum, I replaced the oil filter adapter with one that takes a filter and eliminated the oil cooler. I'm pretty muc...
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