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Prev Professional Automotive Repair Technical Discussions for September 5, 2006
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Open Help Requests for GM
Help Request Answers
1963 Buick Riviera 401CID Voltage regulator
Hi all, Vehicle was towed in as a no start/ crank. Rebuilt original starter, now starts Ok. Tested battery and charging system, battery is fully charged, but alternator is not kicking in. When I full field alt @ regulator, it charges OK{this jumps terminals 1...
1995 Buick Roadmaster 5.7L all interior electrical VIN: 1G4BN52P3R
this car came in on the hook for a no start , i have power at the battery,all fuses and fusable links check ok power in and out of the dist. box, power to ignition switch and switch checks ok, however no accesories power up, no interior lights headlights,ac, r...
1999 Cadillac Escalade 5.7L starting VIN: 1GYEK13R1X
This is a tow in starts and stalls right away i am thinking antitheft but no light on dash at all for it. am stuck not much info on it...note..the key can be pulled out of the igntion any position..but customer say been able to do that for a long time..no code...
1994 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Misfire VIN: 2G1FP22P1R
Car has an intermitant noid or no noid on all injectors. Engine always runs rough or stalls. Never do all 8 injectors have noid at the same time. Cleaned grounds, checked fuses, ok, installed reman computer, checked continuity on wires from pcm to injectors, a...
1996 Chevrolet C1500 5.7L #5 cylinder VIN: 1GCEC14R3T
when engine is cold it runs great but once it reaches 160 deg or higher it runs rough on initial acceleration. most of the time u can only notice it on acceleration from 0 to 35 mph. Once you are above 35mph its runs ok. The ces light keeps coming on for #5 mi...
1997 Chevrolet Venture 3.4L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, Poor Fuel Economy VIN: 1BNDU06E3V
When the van is first started it will run fine for about 5 minutes, then no. 1 cylinder will start to misfire. Gas will start comming out the vent hole in the muffler. About a pint every 5 minutes. The injectors were switch from side to side with no change . I...
1998 Chevrolet S10 2.2L compressor VIN: 1GTCS1947W
This one came in with a dead compressor (not building any highside pressure). We replaced the compressor, accumulator, manifold assembly, the condeser, and flushed the evaporator... Truck left with good pressures blowing ice cubes... Came back 3 days later wit...
1999 Chevrolet K2500 7.4L Poor Idle Quality, Misfire VIN: 1GCGK29J3X
Hi Group, This truck came in with a misfire at idle, sometimes more pronounced and sometimes hardly there. Overall the engine is strong and has good power. I scanned the computer for trouble codes and found none, but the misfire counter for cyl 6 and cyl 5 we...
1999 Chevrolet K2500 Suburban 5.7L Idles way up in Rev.
This chiefs fire command rig is reported to idle up very high in reverse only. We cannot duplicate it at our shop, nor can they due to its intermittent nature. It is very normal for us- only maybe a 50 rpm bump just like when going into drive. It has happened ...
2000 Chevrolet Impala 3.4L Starting VIN: 2G1WF55E6Y
This Impala has an intermittent no crank but at times everything works fine. The starter is not receiving a signal when the car acts up. I tested the 3 fuses that seem to be related to the control side of the starting system, the BCM/PCM/CLSTR, BCM, and STOP f...
2000 Chevrolet S10 2.2L motor mounts VIN: 1GCCS1448Y
I am going to replace the motor mounts on this S-10 tommorow. I would like to know if anyone could send me a r&r proceedure since our MOD does not cover this item. Thanks in advance.
2005 Chevrolet Silverado 2500 HD 6.6L Rear Tires VIN: 1GCHK29235
HI all of you out there have a custermer that brougt this truck to dealer a few times becouse the rear tires on this truck are wearing fast we put 4 new tires on at 17000 miles and he rotates them evry 6,000 miles or so and now the rear are just abuou wore out...
1990 GMC R3500 7.4L Poor Idle Quality, Cuts out, Stall VIN: 1GTHR33N3L
truck sat for 1 year in arizona, drove to minnesota no problems. once here it started running really bad. very long crank, when it does start it will idle up and almost stall and idle up again a few times before stalling. fuel injectors ohm at 1.2 each. the in...
2000 GMC Sierra 1500 SL 5.3L Charging VIN: 1GTEK19T1Y
hi techs.the truck im working on has a intermitant battery light coming on. i have checked the charging system and it reads normal at idle 14.2volts @25amps,at cruise readings are14.2 volts @ 60amps under load. the alternator was replaced twice with a rebuilt....
2002 Pontiac Bonneville SE 3.8L Suspension
Hello I have this 02 Bonneville that came in with a clunck at slow speeds (25mph.) over bumps. It sounded like the typical front struts and plates. I replaced them with Monroe struts and plates. I still have the noise but it doesn't sound as loud. I removed t...
2003 Pontiac Montana 3.4L 2nd gear starts VIN: 1GNDX03E43
the vehicle will start in a higher gear when you come to a stop and then go to pull away . customer will drive vehicle for several days with no fault then will have fault several times that day and then will quit again. we found sevice bulletins for valve body...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Chevrolet S10 Blazer Sport 4.3L brake lite VIN: 1GNCT18Z8K
I posted a fix for the Jimmy the same day it was posted but it didn't go through. Un plugging the ABS computer put out the lite. I went down the wrong path when I was told the lite came on after the column was replaced. Thanks for the help.
1990 Chevrolet K2500 Cheyenne 5.7L Poor Idle Quality VIN: 1GCFK24K4L
thanks for the input.everything that was replied had been checked.it turns out that i need a new fuel pressure quage. fuel pressure was 17psi.new regulator and problem gone.thanks again.
1993 Chevrolet K2500 Suburban 7.4L Low power VIN: 1GNGK26N5P
Hi eveyone and a special thank-you to all 25 of you who took time to respond with help on this suburban. I am sorry it took this long too close this but I was hoping we could come to a fix first. A number of techs thought it maybe could be injectors or fuel pr...
2001 Chevrolet Suburban 2500 8.1L Starting VIN: 3GNGK26G21
As most of the replies stated. Check your cables. I found the positive cable slightly dirty and ever so slightly loose. It has been a week now and no problems with the vehicle. Thanks, Alan
2002 Chevrolet Silverado 2500 6.0L all shifts VIN: 1GCHK24U72
I found a chewed lip seal in the low piston. It was caused by a lock ring that came out, guess it was not clamped in all the way. It's these mistakes that keep us humble, thanks to everyone who replied.
2002 Chevrolet Astro LS 4.3L blower motor and headlights VIN: 1GNEL19X82
Wow! this one is fixed but get comfortable for the explanation. First we had got the vehicle to act up consistently and were able to eliminate concern by performing overide of DRL by pushing the dome lamp overide button 5 times quickly until chime is heard. Af...
2002 Chevrolet Astro LS 4.3L Cuts out, Stall, Misfire VIN: 1GNEL19X42
Okay, First I would like to thank everyone who took the time to read my lenghtly post and espaecialy thanks to those who replied back with ideas and input. I got seven excellent replies and recomend that anyone who is having a similar problem read them. The fi... Trouble codes: P0335, U1300, P0706.
1999 GMC Sierra 2500 SL 6.0L evaporater core VIN: 1GTGK29U8X
Thank you to all who replied. We replaced the low pressure switch and it has been over a week and no complants. THANKS alot!!!
1995 Oldsmobile Aurora 4.0L overheating at idleblock test VIN: 1G3GR62C4S
Replaced water pump, therm, radiator-car still overheating,block checked 5 times and all checked out ok (also checked for HCs & COs in coolant bottle, none found), brought each cyl to TDC and applied shop air and let sit for 20 min each, no cyls were leaking -...
1996 Oldsmobile Aurora 4.0L compressor VIN: 1G3GR62C0T
i was able to retrieve a wiring diagram from a friend and was able to trace out the inputs and outputs of the control module. i found that the low side (cycling switch was bad) switch. replaced the switch and recharged the system after pulled a good vaccuum. t...
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