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Prev Professional Automotive Repair Technical Discussions for April 1, 2009
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L shifting VIN: 1G4CW52L4R
Got an oldie here. This car was in about a month ago and the owner wanted the trans. serviced, it was his sisters car and he didn't know when it was last done. I get a little nervous doing a service with this many miles on it and no verifiable regular maintena...
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2007 Cadillac Escalade 6.2L high idle VIN: 1GYFK63877
Truck came in MIL on and engine power reduced message on. Had multiple codes for throttle assembly. Tested and found bad intermittant. Installed new throttle assembly. Let truck do idle relearn. The truck idles fine until I step on gas then it stays at 2500 rp...
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1994 Chevrolet K2500 Cheyenne 6.5L Stall VIN: 1GTHK34F5R
this veh. will intermittantly stall, whether the engine is hot or cold. no air in fuel return system,so i assume its safe it isn't sucking in air. no dtc's. ckts to fuel control solenoid are sound. when the engine stalls it is very abrubt to the point the serp...
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1996 Chevrolet C1500 Cheyenne 4.3L Misfire, MIL Lamp on VIN: 1GCEC14W7T
This misfire occurs only during "normal" driving.During heavy acceleration and idling NO misfires,runs perfectly!With engine RPM below 2500rpm under load all cylinders randomly misfire,sometimes badly.Cam timing was at -18*,after adj. now at -15*.During misfir... Trouble codes: P0300 (random misfire)
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1996 Chevrolet K1500 Cheyenne 5.7L Hesitation VIN: 1GCEK19R2T
Hi,I have a 96 chev pickup, code 1122 [tps low voltage].I checked with a lab scope and the 5v ref,ground,all were good.I did the wiggle test all good.At no time did I lose voltage on roadtest or in the bay.It seems to be a computer problem. I would appreciate ... Trouble codes: 1122 (TPS intermitting low voltage)
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1997 Chevrolet Cavalier LS 2.4L Stall VIN: 1G1JF52TXV
Walked into the middle of this vehical,Towd in as a poorly running complaint. Now cust complains of a intermitant stalling prob. The fuel trim(long term -17) the iac counts at idle are 0. The idle is about 750 rpm target idle is 600. The iac works and the thro... Trouble codes: P0550
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1998 Chevrolet K1500 Suburban LS 5.7L hard start VIN: 3GNFK16R8W
Hello all. Thanks in advance for any help. This one was brought in on the hook two weeks ago with a crank sensor code, engine was flooded etc. We checked the crank signal on the lab scope, no signal. We replaced the sensor checked and replaced the spark plugs.... Trouble codes: P1626 (pass key code)
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2001 Chevrolet Prizm 1.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1Y1SK52871
This vehicle came in barely running with a bad misfire. After removal of the head, we found burned/cracked intake valves on cylinder 3. After machine shop finished repairs and reaasembly of components, the engine had an extended crank before starting. After st...
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2001 Chevrolet Express 3500 5.7L Front Brakes VIN: 1GAHG39R21
wearing out front brakes
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2002 Chevrolet Express 2500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCGG25R02
Misfire Data shows cylinders #5,7,8 missing like crazy at idle. When I run a injector balance test with Master Tech cylinders 5,6,7,8 show no drop in RPM as do you feel no difference in the engine as you do with the front four injectors. THe front injectors yo... Trouble codes: P0300, P0101
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2004 Chevrolet Impala 3.4L Poor Idle Quality VIN: 2G1WF52E84
Greetings GM Techs, I have a very frustrating problem here. This occurs during idle only. Cylinder #6 will miss fire every 4 seconds, when it miss fires it will last for about 5 seconds, then idle smoothly for 4 seconds, then back to miss firing for 5 seconds.... Trouble codes: P0300 (miss fire detected)
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2005 Chevrolet Silverado 2500 HD 6.6L reverse VIN: 1GCHK29205
hi everyone.I have a problem,Drained fluid and replace external filter on an allison and now it will not move.P0701 pulled.information i have recieved tells me that i have a stuck valve or have lost prime.is it possible to reprime system or find the stuck valv...
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2007 Chevrolet Aveo LS 1.6L Cuts out VIN: KL1TD56657
customer complained about cel found that when it was started first thing in the morning after sitting all night that it misfired badly then cleared up. found 1300 misfire counts on cylinder #3. checked 02 sensor with labscope and 02 sensor is cycling lean rich... Trouble codes: P0133 (h02sb1s1 slow response.)
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2003 GMC Sierra 1500 SLE 5.3L transfer case? VIN: 2GTEK19T73
Hello guys; Hope your shops are busier than mine these days! This GMC farm truck came in today for an alternator and customer said the truck jerked and made lots of noise in 4wheel drive.I drove it and it really sounds bad at times and you can feel it almost ...
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1991 Oldsmobile Cutlass Supreme SL 3.1L Hesitation VIN: 1G3WS54T9M
car came in for hesitation on acceleration from a stop. we confirmed problem, and are unable to communicate with computer. we tried replacement w/ known good & same problem. we have checked all obvious like plugs,wires... etc...
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1999 Oldsmobile Silhouette Premiere 3.4L engine VIN: 1GHDX03EXX
Hi Guys, This van had come into our shop about a week ago with the customer stating that another shop had worked on it and replaced the radiator, water pump, and thermostat, but it overheated on the way home. Since the other shop had the van for over a month...
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1997 Pontiac Sunfire GT 2.4L timing chain tensioner VIN: 1G2JD12T9V
car towed in for no start. found 3 broken exhaust valves. did valve job and returned car to customer. brought back for hesitation. while diag. hesitation, timing chain chain tensioner released, causing valve to bend again. replaced cylinder head, jumped time a...
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1999 Saturn SL 1.9L fuel gauge VIN: 1234QD6612
The fuel gauge is not operating properly after replacing instrument cluster light bulbs while replacing the bulbs must have touched the gauge as it was working properly before replacing the bulb. the gauge was reading empty and pushed needle to the full mark...
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Fixes & Summaries for GM
Fix/Summary Answers
1995 Chevrolet C1500 5.7L Clutch VIN: 1GCEC14H35
Well I chose to put in a GM flywheel...also found that i had the release bearing intalled on the fork incorrectly...it is better but you have to stand on the clutch to get it to go into gear. tomorrow i will try some of the bleeding suggestions i have gotten. ...
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2000 Chevrolet Express 3500 6.5L Poor Idle Quality, Surge VIN: 1GBHG32F8X
THANKS TO EVERYONE WHO SENT INFO, BUT THIS ONE WAS A REAL BRAIN WORKER AFTER PIN TESTING THE ENGINE HARNESS BACK TO THE COMPUTER AND ALL WIREING CHECK OUT GOOD.I WENT OUT AND TOOK A COMPUTER OUT OF A GOOD RUNNING UNIT RELEANED VTD AND STARTED RIGHT UP AND RAN ...
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2000 Chevrolet Silverado 1500 5.3L abs VIN: 1GCEK14T1Y
It's fixed. What a mess. Not real sure what else to say, but it's fixed. Vehicle had been modified drastically by a youngin'. Aftermarket burglar alarm as well, put in looks like by a 10 yr. old. Some of the wires were spliced into the dlc wires. Vehicle...
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2003 Chevrolet Tahoe LT 5.3L Cuts out, Misfire, MIL Lamp on VIN: 1GNEK13Z43
Thanks to everyone who responded. What I ended up doing is replacing the converters (y-pipe) and installing a bank2 pre cat O2 sensor. I road tested for 30 miles and it ran great. The customer has had it for 2 weeks and I haven't heard a thing. I am going to c... Trouble codes: P0154 (ho2b2s1 insufficient activity), P0157 (ho2b2s2 circuit low voltage), P0300 (random misfire).
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2007 Chevrolet Monte Carlo LS 3.5L Cruise/Horn VIN: 2G1WJ15K77
Even though the airbags were not deployed, the clock spring was bad, and had to be replaced. Thanks for all your help!!!
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1998 GMC K3500 Sierra SL 6.5L valve train VIN: 1GCHK33F0W
Thanks for all the info,we decided to put a motor in truck w/there history,Cust getting reman long block assy and we'll be installing it for him.Thanks again for all helpful info. Darren
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