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Prev Professional Automotive Repair Technical Discussions for June 29, 2010
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Open Help Requests for GM
Help Request Answers
1997 Buick Riviera 3.8L all electrical VIN: 1G4D2211V4
Thanks in advance guys.This vehicle was towed to us from tranmission shop.They installed a new trans due to no shifting.Customer informed me they have put on 3 alt. over a 4 month period.Anyway when vehicle got hear the charging system is putting out 17.9 volt...
1997 Buick LeSabre Custom 3.8L Proportioning Valve VIN: 14HRS2K6VH
Brake lines are leaking on this one and I am at wits end trying to find brake proportioning valves for it. GM has on backorder for a few weeks allready and I have not been able to find any listings either looking myself or from calling the parts stores. Anyone...
2001 Buick Century Limited 3.1L Hesitation, Surge, MIL Lamp on VIN: 2G4WY55J31
Vehicle came in with check engine lamp on and the complaint of hesitation and lack of power only when engine is cold. As soon as the engine reaches opperating temp. the symptoms vanish and the car runs great and has lots of power. Tried replacing mass air flow... Trouble codes: P0420 (three-way catalytic converter), P1189 (Oil pressure switch), P1811 (Max Shift Adapt)
1972 Chevrolet C10 Pickup 5.7L Refrigerant VIN: CCE142Z164
I am looking for a factory refrigerant capacity specification for this truck. Does anyone have this number that they can share with me?
1991 Chevrolet C3500 Silverado 7.4L No Start VIN: 2GCGC29N2M
Ive got a problem child here. It has no spark. There is power at the coil and at the module. The magnetic pickup in the dist is working, ive replaced the module, the 4x reference from the module cks good. Im not sure what i should be seeing with the est contro...
1998 Chevrolet K1500 Suburban 5.7L No Start VIN: 1GKFK16R7W
Hey Fellow techs. I have a Suburban that intermittenly will not start. When it will not start I have no injector pulse. Turn key forward the security light goes out but will not start. There is no codes. I have replaced pass lock sensor and housing. Also repla...
2001 Chevrolet Impala 3.4L No Start VIN: 2G1WF55E51
i recently replaced a hazard flasher on a 01 impala.2 ignition cycles later the key won't turn.Retreived code B2964 diagnostic tests point to BCM replace.Is flasher replacement related or coincidence.Any help would be appreciated Trouble codes: B2964 (Key in ignition circuit high)
2001 Chevrolet Venture LS 3.4L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1GNDU23E11
Van has been here a long time and was unable to fix it. Sent it to the dealer and they couldn't fix it. The dealer said to R&R the plugs and wires and put injector cleaner in it. so it is back to me. runs rough, and back fires into the intake when you give it ... Trouble codes: P0300
2005 Chevrolet Malibu LT 3.5L Poor Idle Quality, MIL Lamp on VIN: 1G12T52875
P0300 , but we narrowed it down to #6 cylinder using misfire data from our modis , took front valve cover off to see if there was any mechanical problems , even smoke tested it with the valve cover off , car runs excellent exept for rough idle and slight misfi... Trouble codes: P0300 (Misfire)
2006 Chevrolet C4500 Kodiak C4E042 6.6L Sterring Box VIN: 1GBE4V1246
Good morning, i have a fleet of life squads here and 4 of my 2006 chevy c4500 rigs are having a seriuos problem. As you are driving down the road wether it cruising or a code 3 run it is as you get the feeling the truck will roll over,. You get the feeling as ...
2007 Chevrolet Silverado 2500 HD LTZ 6.6L oil sample VIN: 1GCHK23667
This is my own truck and I am not a diesel guy. Just like the towing power and fuel economy. However, I had a oil sample taken and sent to amzoil. They said there was a large amount of diesel fuel in the oil. Does anyone have any idea on where to start checkin...
1994 Other GM Commodore VR 3.8L Poor Idle Quality, Hesitation, Flat spot off idle VIN: 6HVRK19HRL
This Australian produced vehicle is fitted with a MAP sensed L27 Buick V6 engine in a rear wheel drive layout. Similar US Buick/Pontiac/Oldsmobile vehicles were fitted with the same engine; however I am unsure which ones are MAP sensed. This vehicle has a hesi...
2003 Pontiac Montana 3.4L transmission VIN: 1GMDX03E13
customer complaint trans wont shift out of first gear road tested trans stays in first gear wont shift out of fist gear checked for faults code p0730 earased fault trans did not change dropped pan no metal but trans fluid is real varnished
2003 Pontiac Aztek 3.4L Stall VIN: 3UEIRJ38K3
replaced headds due to cracks. and after start up noticed that it was missing on cyl. 5 checked plug and wire ok while looking at car the miss moved from 5 to cylds 1 and 6 constant misses it also has a hard start you have to really throttle it heavy to get it... Trouble codes: P0300
2006 Pontiac Torrent 3.4L Battery VIN: 2CKDL63F76
Further testing we jumped the car at the starter relay and the car starts. We cycled the key pad lock/unlock button and the car did not start. We used the key in the doors and the rear deck lid and no change. The anti-theft light is not flashing. There are no ...
2007 Saturn Vue 2.2L 1st gear only VIN: 5GZCZ33D26
Thanks for any help up front, this Saturn Vue will not shift and my SnapOn Solus Pro wil not communicate with the TCM, it will with the rest of the modules. There are no ECM codes & all fuses good. The problem I am having right now is finding the location of t...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick LeSabre Custom 3.8L engine VIN: 1F4G58FFT6
Thanks to all 22 people who replied. 18 out of 22 said starter . The drive return spring must be a common problem with these cars as most said it would break and let the bendix contact the flywheel. Looking back that is the exact type sound it is making. Whene...
1982 Cadillac Eldorado 4.1L Poor Idle Quality VIN: 1G6AL5788C
ok well the customer ended up giving me the car. I rechecked everything, found the 3 amp fuse blew due to too much amp draw while testing with a headlight as someone suggested. found again i was not getting ground signal from the computer. I tried to get a n...
2001 Chevrolet Blazer LS 4.3L Brake Pedal VIN: 1GNCT18W51
We performed the "paper clip" test that Laneard [...] recommended and to my surprise, the ABS pump was indeed bypassing. We replaced the pump and the problem is gone. Thanks!!!
2002 Chevrolet Silverado 1500 5.3L Transfer Case VIN: 1GCEK19T42
Thanks for all the excellent responses. Pretty much everyone was right one way or another.The shift motor on the transfer case shorted out which in turn shorted the transfer case module and blew the ATC fuse.Everything good to go. I found that both wires going...
2003 Chevrolet Tahoe LT 5.3L MIL Lamp on VIN: 1GNEK13Z73
Thank you to all who helped. I went ahead & replaced the throttle body on this vehicle & that fixed it. Customer has had vehicle back for 4 days now & I have not heard back. As for the instrument cluster, that will wait till another day. Thanks again. Trouble codes: P1516.
2004 Chevrolet Silverado 2500 HD 6.6L brakes? VIN: 1G2THK22G7
thanks to all 8 of you who posted a reply,all the sugestions were good ones,since the brake rod isnt adjustable i flushed the p/s system replaced the hydro boost unit and problem is gone,for now at least,i suspect there steering gear has some internal issues a...
2004 Chevrolet Suburban 1500 LS 5.3L fuel in cannister VIN: 3GNFK16TX4
I apreciate all the replies and im sorry for the late closing. A new fuel tanks fixed this one. The baffling in the tank came loose and caused all sorts of problems. thanks again Trouble codes: P0455.
1992 Oldsmobile 88 Royale 3.8L No Start, mil off VIN: 1G3HN53L6N
2001 Pontiac Grand Am SE 2.4L directional VIN: 1G2NE12T91
thanks for all the help.replaced the multifuntin switch. everything works fine
2007 Pontiac Montana SV6 3.9L Rr Wss VIN: 1GMDU03187
thank you for all the replies...seems that the plug going up into the interior of the vehicle by the sliding door on the drivers side had a corrosion problem, some elctrical cleaner and a nice tight fit fixed the problem..thanks again everyone
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