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Prev Professional Automotive Repair Technical Discussions for December 31, 2008
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Open Help Requests for GM
Help Request Answers
1999 Buick Regal LS 3.8L valve noise VIN: 2G4WB52K6X
Vehicle came in with an severe overheating and loss of coolant problem. Found the intake plenum (plastic) to be broken, and engine oil was mixed with coolant/water as well as coolant/water mixed with oil. Removed heads and sent to reputable rebuilder for valve...
2004 Cadillac SRX 4.6L Stall VIN: 1GYDE63A44
hello techs intermittant stall that only happens when trans selector is put into park . reduced engine power warning comes on monitor , all driveability + scanner seems correct drives normal engine runs strong.
1995 Chevrolet Blazer 4.3L No Start, Stall, MIL Lamp on VIN: 1GNDT13WOS
truck came in with start&stall found codes p0107 p1107 did flow chart from Mitchell & identifix came up with bad vcm in stalled vcm put outside to wait on map sensor pig tail. went to pull it in start & stall check codes po107 p1107 same thing scan tool reads ... Trouble codes: P0107 (map sensor low voltage), P1107
1998 Chevrolet Venture 3.4L Excessive Emissions, Cuts out VIN: 1GNDU06E5W
This van came if for tune up because it failed emission on crusie CO 0.53%, HC 97, NOX 2500. I do not have a gas analyzer and dyno, may be i should i let this one go after the tune-up and maintenance service. However on checking scan data i found it showing ...
1998 Chevrolet K1500 Cheyenne 5.7L Hesitation, Cuts out VIN: 2GCEK19R9W
Good day people. I have this vehicle that will intermittently cut out while driving down the road. The vehicle will usually restart right away. Sometimes it will almost stall, and the tach will drop to about 300 RPM's. The client will step on the gas and nothi...
2004 Chevrolet Express 3500 6.0L steering box VIN: 1GBJG31U44
Hi this vehicle was brought to me from another shop, vehicle was wrecked over the summer. It was hit on the right front and frame was bent. another shop installed right inner tie rod end and lower control arm. frame was not straightened at that time. this week...
2004 Chevrolet Silverado 1500 5.3L air bag VIN: 2GCEK19TO4
Have codes for the seat position sensors bo83 and bo84 also code for lost comunication U1096. Is there a problem with a certain ground or connector that can cause these codes? Trying to save some time here, codes reset after about a week. Hard to believe that ...
1997 GMC Yukon SLE 5.7L No Start VIN: 1GKEC13R6V
Vehicle towed in no start. Hooked up scanner, no codes. Tried to start vehicle. started. Unhooked scanner truck died. Hook up scanner truck starts. Checked all fuses under dash and under hood. Tried new ignition switch same results. Checked ground and power ci...
1999 GMC Sonoma SL 2.2L Hesitation VIN: 1GTCS1444X
truck came in for a quick stumble or hesitation on acceleration or decel. preformed computer test and no dtc's were found. list's no misfires in data or in mode 6. spark plugs and wires have been replaced. with ac delco parts. used a test module and coil's. ma...
2002 Pontiac Grand Am GT 3.4L hazard flasher VIN: 1G2NW52E72
customer had hazard flasher replaced, it clicks as your driving without turn signals or hazard engaged. all lights work correctly but clicking noise started sometime back. any help would be appreciated. thanks
2002 Pontiac Firebird 3.8L No Start VIN: 2G2FS22K62
I have a fire bird with no fuel pressure .I have checked power goes to connector at rear and jumpered power to pump but still does not run. It looks like rear end has to be removed or lowered to get tank out. Book says this and shows labor time of 4.3 hrs. Has...
1998 Saturn SL1 1.9L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G8ZH528XW
Cleaned induction system.

Fixes & Summaries for GM
Fix/Summary Answers
1986 Chevrolet K20 Custom 5.7L Cuts out VIN: 1CCGK24M0G
Well the truck is fixed. It was a combination between a weak fuel pump and a stuck fuel filter check valve blocking fuel. The filter was recent and it is dummy proof as far as installing it bass ackwards! It was overlooked because of how new it was but ya neve...
1997 Chevrolet K1500 Suburban LS 5.7L Poor Idle Quality, Cuts out VIN: 1GNFK16R0V
Short story, when checking for crank sensor relearn my tech noticed knock sensor at 5 volts, disconnected knock sensor and timing came back, replaced knock and re set base timing, test drove OK. Trouble codes: P1345.
2000 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNFK16T5Y
Great help! this customer wants to wait until after the first of the year. i'm confident we have hit the nail on the head! Thanks again many times over to all who helped. great responce,info Darren @ p.s. tire Trouble codes: P0442.
1995 GMC Jimmy 4.3L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1GKCT18W85
Thanks for all the replies, but no one got this one. Several said about bad ground problems. I double checked all the grounds and power inputs- all OK. I tried another new PCM to make sure it was not a bad one, and also replaced the PROM- did not help any. The...
1999 GMC Yukon Denali 5.7L brake system VIN: 1GKEC13R4X
We did not find any leaks in the system anywhere the master cyl was new. Thanks for all the great replies we replaced the wheel cyls bleed abs system re check for leaks so far so good thanks again.
1997 Saturn SL1 1.9L reverse-& 1-2 shift VIN: 1G8ZH5286V
We took the advice of two of the replys and changed the trans filter and removed the side cover and tightened the nuts on the input shaft. they were torqued to about 40 ft. lbs and all data said they should be 111, shifts are now firm but not harsh. Thanks...
2003 Saturn Vue 2.2L motor VIN: 5GZCZ43D53
The Saturn vue is fixed. The SDM module was the problem with the air bag light. The tranny was also bad.Because the CVI transmission has a bad track record, Saturn was willing to pay 75% for it was a 2nd owner and out of warrantee. We opted for a new transmis...
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