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Prev Professional Automotive Repair Technical Discussions for July 15, 2013
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Open Help Requests for GM
Help Request Answers
2002 Chevrolet Impala 3.4L Starter VIN: 2G1WF52E92
Hey again, IATN! Got a real quirky one here. Vehicle has an intermittent no crank condition, which only happens when the vehicle has been sitting outside (not in the shop) for an hour or more. KOEO, all dash lights except the check engine light are inop, if y...
2003 Chevrolet Suburban 1500 LS 5.3L chime/brake warning light VIN: 3GNEC16T43
Brake warning light and chime activate simultaneously during moderate to fast acceleration from stop, sometimes brake light only, does not seem to occur when turning right. Check all the usual suspects, like brake fluid level, sensor wires, even check for door...
2006 Chevrolet Silverado 2500 HD LT 6.0L Hesitation, Surge, Misfire VIN: 1GCHK23U86
Hoping someone can help, I have this truck that when you really get into it has no power. This thing has been to every shop around. When I get up to around 4,000 rpm it's just like it is standing still. Misfires count like crazy on #6, it will only do it under... Trouble codes: P0300, P0101
2007 Chevrolet Impala LT 3.5L 1st gear VIN: 2G1WT58K37
what happens is when he goes to take of from a stop, the trans slips (engine flairs) real briefly (1 sec) and then has a harsh engagement and goes. it happens mainly when then car has cooled off. when it does happen it seems to happen for a couple of days and ...
1997 GMC Jimmy SL 4.3L Mechanical VIN: 1GKDT13W5V
Hey guys. I received this jimmy as a no start and ultimately found distributor out of time a few teeth. Upon inspection found the distributor drive gear teeth worn uneven and to a very sharp point on some teeth. boroscope inspection of camshaft did not reveal ...
1990 Oldsmobile Toronado 3.8L Head Lights VIN: 1G3EZ13C4L
This vehicle quit running in front of our shop. We pushed into one of our bays and found the CAT completely plugged,melt down. We installed a new CAT and the vehicle was running very bad(reason for the melted CAT) We found a bad MAF sensor and it ran alot bett...
1997 Pontiac Bonneville SE 3.8L fuel pump/ guages VIN: 1G2HX52KXV
Car came in with ses for O2 sensor. I rewired the O2 and moved the car out of the shop. Now the car is a no start and the fuel pump is dead as well as ALL cluster guages, and idiot lights exept seat belt and security. Key on security comes on for 5 sec and goe...
2007 Pontiac G6 2.4L steering VIN: 1G2ZF58B47
now costmer said steering wheel shakes by itself. we replace steering column and re calbrated sensors. still have wheel that shakes by itself. need some help. the shake will go away for short time then come back. I've drven car with snap on verus looking for g...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Chevrolet V10 Custom Deluxe 5.7L Hesitation, No power upper RPM VIN: 1GCEV14K5H
Replaced throttle body with the correct one.Suspect regulator was bad.Runs Great thanks for all the help. Trouble codes: 43 (testing and results).
2001 Chevrolet Express 3500 5.7L brakes VIN: 1GAHG39R41
ok sorry it took so long to close but customer went out of town,we replaced the abs module and brakes work fine now.
2003 Chevrolet Silverado 1500 5.3L door switches VIN: 1GCEK19TX3
Well, the customer took the truck and has not come back yet. Several suggested that the door module needs to be reprogrammed, but others say they have swapped them out with used items without programming. It appears that only brand new modules must be programm...
2008 Chevrolet Impala LT 3.5L Acutator VIN: 2G1WT58N88
Thanks to all for your help. It is fixed. The major problem was sticking temperature doors - Chad from California got me thinking about the doors binding - with the actuators off I turned the doors which were very "sticky" I used some brake cleaner and got the...
2009 Chevrolet Cobalt LS 2.2L BUS Communication VIN: 1G1AR55H29
Thanks to all who replied. The customer has since taken the vehicle and has not called or returned with the same problem. I performed some tests recommended by you guys and nothing as of yet. If they return with same problem I will update again. Trouble codes: U2100 (CANBUS Communication), U2105 (Lost Communication w/ECM), U2106 (Lost Comminucation w/TCM), U2111 (Lost Communication w/Steering Control Module), U2129 (Lost Communication w/Remote Function Actuation), B1325 (Device Power 1 Circuit Voltage below Threshold).
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