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Prev Professional Automotive Repair Technical Discussions for September 16, 2008
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Open Help Requests for GM
Help Request Answers
1996 Buick Regal Custom 3.1L MIL Lamp on VIN: 2G4WB52M3T
car came in with mil lamp illuminated with code po401a. we egr valve & connector, clean egr tube & upper plenum. light comes on after cust picks up car & drives 1 1/2 weeks of local stop & go driving. no running problems are experienced. thanx Trouble codes: P0401
2001 Buick Century Custom 3.1L Excessive Emissions, Misfire VIN: 2G4WS52J11
I have a misfire on this 3.1 that only occurs after it is in closed loop, it almost seems that it is at Rev Limit during accel? Misfire monitor shows multiple, however cylinder #1 and 2 seem to be affected most. NO head leaks. Plugs are new, tried a new module...
1994 Chevrolet p30/Winnie 7.4L brake pedal VIN: 1GBLP37NOS
Hi All got a low (3/4) spongy pedal before & after rear pads, blocked off front calipers, pedal 80 % better, teardown front calipers, grease sliders,ck wbrngs, all ok not flexing no wear VERY low miles this is first brake job, rear shoes down to nothing, front...
1994 Chevrolet K2500 Cheyenne 6.5L Poor Idle Quality, Surge VIN: 1GCGK24F6R
Looking for some help with this truck . Has poor idle with what could best be described as a surge . When it is acting up the fuel rate bounces from as low as 0 to as high as 100 . If after started you unplug crank sensor it runs ok . I tried new crank sensor ...
1995 Chevrolet Camaro Z28 5.7L lf abs motor VIN: 2G1FP32P3S
Hey guys, Another stumper. This thing keeps on turning on the ABS INOP light and code 57. Originally when we tested it it came up as ebcm. We replaced it and it stayed out for a day. Retested and ebcm was ok. Replaced lf motor. Light came on on 1st test drive...
1997 Chevrolet K1500 4.3L Poor Idle Quality VIN: 1GCEK14WXV
this truck came in the shop that while going on the highway this truck hesitates.the customer complained that the problem looks fuel related.i hooked up the scanner and and got p0300,egr code,and short or open for sending unit signal.when you look at the misfi... Trouble codes: P0300
1998 Chevrolet C1500 Cheyenne 4.3L No Start, Cuts out VIN: 1GCEC14W5W
This vehicle intermitently starts, when running cuts out shortly after starting. Check fuel system, ignition, and charging circuit all check out fine.
2000 Chevrolet Venture 3.4L bucks/jerks VIN: 1GNDX03E8Y
This vehicle is a strange one, customer brought in complaining of cuttting out on highway at 60 mph or over so we're thinking fuel system first. Not so, fuel system is fine, pressures good, no lean condition occurring. No codes, drove on highway and could not ...
2001 Chevrolet Express 3500 6.5L transmission range selection VIN: 1GBJG31F01
Customer complained of erratic transmission operation. Check engine light on,stored code p1810,with tech 2 was able to determine transmission range selection not correct. Reads correctly in all gears except for Drive-reads as in Park/Neutral. Replaced TFP Man...
2002 Chevrolet Silverado 1500 4.3L No Start VIN: 2GCEC19W62
This vehicle was impounded and we towed it in. Cust states it died when he was pulled over. When cust paid tow bill engine cranks but wont start. I disconnected MAF sensor due to code. still no start. has good rpm signal on scan tool. engine will start with ca... Trouble codes: P0102 (MAF sensor circ low input)
1987 GMC S15 Gypsy 2.8L Mechanical VIN: 1GTDT14R1H
Hi, We have a 1987 GMC S15. It originally came with a 2.8 liter but at some point a 3.4 liter was installed. I understand this was a replacement engine for the 2.8. I assume the tune-up and maintenance parts are the same but would like to make sure. When orde...
1995 Pontiac Bonneville SE 3.8L No Start, module failure VIN: 1G2HX52K8S
i'm experiencing multiple ignition module failures and have replaced with aftermarket and delco modules. i've checked wiring to module and found no faults. coils are original but no misfires detected. i'm scratching my head trying to figure out why this car is...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet Blazer 4.3L Cuts out, Stall VIN: 1GNDT13W9T
Sorry for the delay in closing. First thank you all who responded your replys have given me a direction to go in. The customer took her vehicle due to school starting and she hasnt had time to bring it back. Just to update you all on what ive done. I did rep...
2003 GMC Yukon XL 2500 SLE 6.0L Misfire, MIL Lamp on VIN: 3GKGK26U23
I appreciate everyones input on this problem, however I was unable to duplicate the complaint. One thing I did find was that It only had 60 psi of fuel pressure under load and according to Roger from Az. I should have 62. He also advised to clean and or replac... Trouble codes: P0353 (Malfunction in primary ignition circuit.).
1999 Oldsmobile Aurora 4.0L Excessive Emissions, MIL Lamp on VIN: 1G3GR62C3X
this was a wait to see if the light was going to return i cleaned the fuel system and replaced the throttle body gasket customer stated the mil has not returned Trouble codes: P0151, P0153, P0174.
1999 Pontiac Sunfire SE 2.2L Radio VIN: 3G2JB1241X
Hey, thanks to all that replied. The unlock code was 1491. It is to bad there isn't a formula out there, to take the two numbers you get out of the stereo and turn them into the code. It would save a lot of calling around to dealers trying to get someone to gi...
2004 Pontiac Grand Prix GT1 3.8L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 2G2WP52224
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