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Prev Professional Automotive Repair Technical Discussions for November 7, 2008
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Open Help Requests for GM
Help Request Answers
1996 Buick Roadmaster Collector's Edition 5.7L Misfire VIN: 1G4BN52P0T
Customers car came in for a no start. Customer replaced plugs and wires. We found distributer cap corroded and fuel pump was weak. Replaced distributer cap and rotor and fuel pump. Now Engine runs, but has misfire under load. Seems ok during idle. Once it is p... Trouble codes: P0300 (engine misfire detected), P0155 (02 heater circuit bank 2 sensor 1), P1441 (Evap system flow during non purge)
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1999 Cadillac Eldorado ESC 4.6L no start VIN: 1G6EL12Y3X
hello, we replaced the engine (customer supplied) and then had no start. not sure if ran before. customer put 2 gal of water in crankcase and drove. now i have no spark, no injector pulse. recheck timing chain. checked both crank and cam sensors, tested wiring...
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1968 Chevrolet corvette 427CID Wipers VIN: 194678S403
My biggest problem with this car is that I am having a problem locating a wiring diagram, vaccum diagram and proper testing procdures needed to diagnosis and repair the problem. I have a 68 mitchell manual but the diagram in there doesn't even come close to wh...
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1991 Chevrolet Camaro Z28 5.7L High idle VIN: 1G1FP2386M
This is my first help request so I hope I get it right.This car has a long history with my shop,but the most recent problem is;when you start it cold the idle speed will not go below 1300 rpm until I turn the key off the first time.Idle speed than returns to 7...
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1997 Chevrolet Astro 4.3L No Start VIN: 1GNEL19W8V
This one is baffeling. Came in as a no start, had no fuel pressure, power and ground to pump ok, replaced pump. Still no start. Has good spark, fuel press 62psi, inj.pulse, Cut exhaust to ensure no restriction, 2-3in vac. during cranking, shows rpm on scanner ...
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1999 Chevrolet Malibu 3.1L Cuts out, 17inch,vac-22iac mot VIN: 1G1ND52J7X
thank you all up front! i have three concerns. most troubling,any time gas is added the car stalls after the added gas(it had 3/4 tank of gas already,i added5.00- not even 2gals.)it stalled when restarting the car.again i did have a purge during non-command co... Trouble codes: P0171, P0172, P1441
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2000 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1946Y
We are atempting to do the crank sensor relearn procedure on this vehicle and P1336 (CKP System Variation Not Learned)code is still present. Snap On MT2500 scanner is reading coolant temp at 80 degrees. Temp on gauge of truck works satisfactory. Went into the ... Trouble codes: P1336 (CKP System Variation Not Learned.), P0463 (Fuel Level Sens CKT signal high/low)
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2001 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 2GCEC19T5M
FELLOW TECHNICIANS: I COME TO YOU TODAY WITH THIS GEM. CUSTOMER COMPLAINT WAS MIL ILLUMINATED. CODES P0300 & P0753 IN HISTORY, AND RESET AFTER TEST DRIVE. I'D LIKE TO DISCUSS THE CONDITIONS FOR CODE P0300. ON OUR MODIS WE CAN SEE A HISTORY OF MULTIPLE MISFIRE... Trouble codes: P0300 (random misfire), P0753 (shift 1/2 solenoid)
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2003 Chevrolet Silverado 2500 HD 6.0L tcc
I have a 2003 Silverado with a TCC problem. The customer noticed that the fuel economy had fallen off and the rpm was approx 2-300 higher at cruise. I scanned the vehicle with the tech 2 and the TCC is not being requested, there are no codes being set. I looke...
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2004 Chevrolet Suburban 1500 LS 5.3L no rear heat VIN: 3GNFK16Z34
Customer came in with no rear heat, Front heater works great. Fan in rear does run but cant get heat out of rear heater core. did flow test & flushed but still no heat. both coolant lines are hot all the way to back. hoping someone has had this problem and has...
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2005 Chevrolet Silverado 1500 LS 5.3L 4x4 VIN: 2GCEK13T25
truck came to us with a 4 wheel drive problem. we replaced control panel worked until it left.came back ck with scanner code was, co327 i can not find anything on it. i sure wood like some help. thanks
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2006 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNET16S36
Hi. I need help with a 4.2l runing lean. It came in 2 days ago with engine light flashing (code p0304-misfire cyl. 4) putting a new coil and plug in cly. 4 took care of that. came back next day with engine light on (p0171-system lean bank 1), the short term tr... Trouble codes: P0171
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2007 Chevrolet Silverado 2500 HD Classic WT 6.0L Poor Idle Quality, Hesitation, Surge VIN: 1GCHK29U67
original complaint was cutting out and loss of power on this truck. I checked for codes and didnt find any. tested fuel pressure and it is at 60psi and flows about 15oz in 15sec. i could not duplicate complant, but after talking with customer we replaced fuel ...
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2000 GMC K2500 Sierra SL 5.7L Will Not start VIN: 1GTGK24R9Y
I am the lucky one that ended up with this truck, The engine was replaced due to backfiring and poor fuel mileage. I check TSB's, found 1 for crank sensor, check sensor and replaced as someoned crimped it together. I have done what I believe are all the basic ...
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2001 GMC Yukon XL 1500 SLT 5.3L Fuel Guage VIN: 3GKFK16T81
Fuel Guage reads full sometimes and then will drop to empty. Removed fuel tank thinking that it was the fuel sending card. Found broken fuel pump/sending unit module. Tried to install new "Delphi" OEM replacement fuel pump module. I am unable to install the fu...
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2003 GMC Sierra 2500 6.0L starter VIN: 1GTHK29U03
starter relay not being commanded on by pcm i can manually ground relay and starter will crank i think its a problem with the pcm ground side. the switch seems to be operating properly.
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1988 Oldsmobile Delta 88 Royale 3.8L fan speed VIN: 1G3HY51COJ
I have this olds which has the push button fan speed selection. All speeds work except for the hi speed position. I need some ideas before I tear the dash aprt. Thanks for your help Rick
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2004 Other GM P42 6.5L 4-3 downshift VIN: 5B4KP42Y54
Okay, I need gm trans gurus. We have this work van that a very good customer just bought for his contracting biz. It was purchased with a new Jasper reman engine, it is a former Fed-ex home delivery vehicle. The rear diff is a 5.13 Dana 80 . There is a delay i...
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Limited 3.8L Seatbelt/key-in-ignition chime VIN: 1G4HR54K7Y
We found a bad drivers door module. customer refused the repair.
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1978 Cadillac Seville 5.7L No Start VIN: 6S69B80480
The response I got on this problem was fantastic. I have tried everything however I have not solved it. To update you I have checked the temp. sensors they are all in specks. I pulled the dist. and checked the pick up for the injectors. It looked fine b...
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2002 Chevrolet Express 3500 5.7L Misfire, MIL Lamp on VIN: 1GBHG31RX2
THANKS STEVE,BOBBY,PAUL,JOHN,JAY,FRANK.I DID WHAT FRANK SAID .DRIVE TRUCK WITH VOLTMETER ON COIL POWER WATCH FOR VOLT DROP IT DID.THEN FRANK SAID WERE TO FIND THE SHORT.WERE THE TRANS DIPSTICK RUBS THE HARNESS. THANKS TO ALL Trouble codes: P0351, P0300.
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1992 Oldsmobile Custom Cruiser 5.7L Excessive Emissions, Hesitation, Poor Fuel Economy VIN: 1G3BP8370N
We still haven't fixed this vehicle. Everyone that replyed to my help request told me the same things that I suspected already. It shouldn't go into clear flood mode unless the tps is reading too high. We tried a new pcm, a new prom, and a new tps. All wer...
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1998 Oldsmobile Intrigue 3.8L Steering wheel VIN: 1G3WH52K2W
Thanks for the help some ideas were to replace steering shaft or cooler line (tsb). Ordered new steering shaft waiting for parts and customer return. I will keep you posted on other info thanks again.
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1992 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX3L3N1
well after alot of testing to see if i was losing spark or fuel,my employer has an identifix acct which i used on this one we went through every test step by step,we determined the torque converter is the culprit,because with out load it doesn't die.the custo...
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1997 Pontiac Trans Sport 3.4L MIL Lamp on VIN: 1GMDU06E7V
sorry for the delay in the closing of the request. The problem with the evap code is still ok, the van came back to me, not the other shop(which caused issues) with an 02 code. i didnt want to update the requesat untill i knew the evap code was gone and it w... Trouble codes: P1441 (evap system flow during non-purge).
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1999 Pontiac Montana 3.4L Misfire, MIL Lamp on VIN: 1GMDX03EXX
Thanks to all the replys. We could not find a problem, compression etc. were all good. Customer decided to take the van back to the people who installed the intake gasket and have them recheck their work. Trouble codes: P0300.
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