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Prev Professional Automotive Repair Technical Discussions for January 21, 2010
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Open Help Requests for GM
Help Request Answers
1992 Buick LeSabre Limited 3.8L No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G4HR53L2N
3 times in the last 2 months vehicle has been towed in for a crank no start. Every time vehicle has had water in the fuel. 1st time towed in, the injectors were not firing properly because they were getting sticky. Noticed alittle water in the fuel but not en...
1998 Buick Park Avenue 3.8L No Start VIN: 1G4CW52K3W
Hi fellow techs. I have this 98 Park Ave 3.8l. I had it in for a head gasket issue. We did the work and went to start it up we had no crank and security light was on. I scanned it and recovered a P1626 code. I know this code shuts off the starter and fuel inje... Trouble codes: P1626 (anti-theft fuel enable circuit)
2003 Buick Regal LS 3.8L Power Steering Rack VIN: 2G4WB52K73
Hey, replaced the rack on this car initially due to customer request. There was some seepage from the bottom of the pinion gear area. The first rack we replaced it with (I think a company called a-1) didn't make it a single day. Came back next day, no fluid, ...
2006 Buick Rendezvous CXL 3.5L Stall, Hard Start VIN: 3G5DA03L36
I have this rendezvous giving headaches, the customer states he has a crank no start a couple times before it starts sometimes, i checked fuel pressure and found it bleeding down to zero. due to being a returnless system the fuel pressure regulator is part of ...
1992 Cadillac Seville 4.9L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire VIN: 1G6KS53B6N
Customer brought car in running very rough and BLOWING blue/white smoke out of exhaust. Customer said that it only does it intermediatly. I saw that the modulator valve was really wet with fluid around the vacuum line. I replaced it and it ran fine for 20 mile...
2003 Cadillac Seville SLS 4.6L replace pads lamp on VIN: 1G6KS54Y23
We replaced the ABS module with a used unit do to codes: -C1214 Sys selo circuit relay -C1248 EBCM turned brake lamp on Both codes are now gone with my new module. I now I have "Replace brake pads soon " lamp on. I'm aware of needing to have the module program...
1995 Chevrolet Blazer 4.3L Hesitation, Surge, Cuts out VIN: 1GNDT13W5S
Hi everyone first timer be gentle. vehicle came in with a clogged cat replaced ran ok did plugs and motorvac'd inj's. I test drove 3 miles and it ran fine. Customer said it wouldn't run. I had it towed back and it started and ran fine wiggled wires at 2 wire i...
1997 Chevrolet C1500 5.0L Misfire VIN: 2GCEC19M4V
This vehicle came in not running. The guy parked it because it ran bad. It's been sitting a couple of years, the plate expired in '08. Started with fuel pump & filter. Gas was varnished and emptied it out. I put in 6 gallons of Chevron 87 grade. Truck started ... Trouble codes: P0300 (Misfire detected)
2004 Chevrolet Tahoe LT 5.3L temperature VIN: 1GNEK13Z84
first check out revealed low coolant and dripping from lower hose from recent water pump replacement. fixed leak and filled it up, test drove, still overheats (runs about 235 degrees). found a few articles on identifix about using the coolant tube at throttle ...
2005 Chevrolet Silverado 1500 HD 6.0L ignition switch VIN: 1GCGK13V25
We got this chevy in a month ago. Customer said he was starting the truck with a screwdriver, jumping the solenoid. We tested the ignition switch, and it was bad. The starter wire wasn't hot in crank. Replaced the switch and the truck seemed to start fine. The...
2008 Chevrolet Suburban 1500 LTZ 5.3L Misfire VIN: 1GNFK16398
the vehicle runs fins. no skip or hesitation. i am trying to perform a BG induction and fuel inj service in order to continue. However, I cannot stop the fuel pump. WEIRD. I pulled the fuel pump relay and fuse #20 from the under hood fuse box and the vehicle k... Trouble codes: P1175 (fuel trim bank 2)
2001 Oldsmobile Alero GL 3.4L Misfire VIN: 1G3NL52E41
This vehicle came in with a misfire under load between 70 and 80 km/h. Scan data shows that all the cylinders misfire when it occurs. Fuel pressure and fuel filter are ok. Cleaned the mass air flow sensor. Blocked the EGR. Changed the plugs and wires. Did a cr...
2005 Pontiac Vibe 1.8L MIL Lamp on VIN: 5Y2SL63805
I need to know if anyone can tell me what these codes mean. i can find no info on them. Trouble codes: 43E, 43F, 2401 (undocumented code), 2402 (undocumented code), 2419 (undocumented code)

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Regal LS 3.8L Cuts out, Misfire VIN: 2G4WB52K0V
WOW! First I would like to thank everyone for the overwhelming response. 42 replies! Way to many names to mention, and lots of great responses. I think there are many very helpful tip's hints and checks that could help someone else in them. Thank you sooo muc...
1994 Chevrolet C3500 Cheyenne 6.5L lack of power VIN: 1GCHC33XR3
we at Martins thank everyone for all the info.LEROY, you nailed it.I had already blown from lift pump to tank before reading your post, and truck ran great.going to pull tank and clean and install new strainer,cust says lift pump later, explained hazards. But ...
1997 Chevrolet Monte Carlo LS 3.1L balancer VIN: 2G1WW12M1V
thank you for all of your replies it must of been a combination of the belt and the dorman balancer. the longer we went the less it would arc. the only thing we can surmise is that the paint that they use on the balancer has something in it that reacted to the...
1998 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19WXW
almost everyone said to change out ignition parts. All parts had been changed at least once with oe, ac delco, parts with same results. I can trigger the coil out of the car with an hei test plug and have no problems. This is still a mistery to me but you hav...
1999 Chevrolet K2500 5.7L No Start VIN: 1GBGC24R5X
Thanks to all who have replied to me.We replaced the cap and rotor and so far all is well. Again thanks to every one who replied to me.
2002 Chevrolet Silverado 2500 HD 6.6L reverse VIN: 1GCHK29162
Thanks to everyone that replied. This one is fixed. Nobody that responded got this one. I found that the TCC PWM solenoid (solenoid F part # 8683187) would fail open when hot causing no TCC and a code P0743 & p0700. The TCM will also inhibit reverse for that k...
1996 GMC G3500 Vandura 5.7L Misfire VIN: 1GTGG35K6T
Still have not resolved this issue. The EGR has been tested and it works properly and doesn't leak. Vehicle drives exactly the same with EGR connected or dis-connected. Vehicle has new computer, PROM, complete distributor, plugs, wires, O2 sensor, MAP senso... Trouble codes: 43 (ESC Knock Control).
2003 GMC Sierra 2500 HD 6.6L No Start VIN: 1GTHK23163
Sorry it took so long to close this post, some of the parts we needed had to come directly from Isuzu and the customer needed some time to come up with the money to pay for it also. We removed the front cover and had to use a puller to remove the oil pump dri... Trouble codes: P0341 (CMP sensor circuit out of range), P0380 (Glow Plug heater circuit problem), P0374 (Timing reference signal A no pulses), P0530 (Refrigerant pressure sensor circuit), P0622 (Generator field F control circuit problem), P0700 (Transmission control system fault).
2004 GMC Sierra 3500 8.1L ABS Module VIN: 1GDJK34G14
After many helpful emails & replies, I have concluded the EBCM is in fact bad. One tip surly helped prevent future problems- I removed the under-hood fuse center cover & tilted it up only to reveal a nest built with the insulation from the firewall. Found se...
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