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Prev Professional Automotive Repair Technical Discussions for October 26, 2005
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L trans solinoid's VIN: 1G4GD22135
Ok hear is the hole story this car came to us with a customer complaint of a engine miss on accel. I test drove the car it felt like a ignition miss. The symptom is very easy to duplicate . I scope checked the cam and crank sensors all looked good. So I checke...
2000 Buick LeSabre Custom 3.8L no electric power VIN: 1G4HP54K0Y
HI Guys, We have a Buick with an intermitent no start after warm up. When this happens the car has no electrical power except for power seat, door chime, trunk light and horn. Thats it. We have no headlights, dashlights, dome lights,power windows not even door...
1995 Cadillac Seville STS 4.6L Poor Idle Quality VIN: 1G6KY5298S
customer bought this car recently he had a complete tune-up at some other shop wires,spark plugs,fuel filter,air filter e.t.c but he is concern of this particular symptom after sitting for a few hrs. car starts misses for a few seconds and then it clears after...
1978 Chevrolet C30 Cheyenne 7.4L brakes VIN: CCS348Z214
We have this truck that has a hard brake pedal. The customer has had the hydro boost replaced already. both of the lines to the unit are new. Power steering works normally. When we started on the truck the front brakes were stuck on. We tracd this back to the ...
1990 Chevrolet G30 Sportvan 7.4L Poor Idle Quality, Hesitation, Rough Cold Start VIN: 2GBGG39N6L
Customer bought vehicle used (Got a GREAT DEAL on it). Went on road trip to S. California on the way back just above the empty mark pulled into a gas station and filled the tank. 10-15 miles later vehicle started acting differant. Misfiring, CS drove vehicle a...
1990 Chevrolet Corsica LT 3.1L Late Shifts VIN: 1G1LT54T3L
Vehicle came in with a complaint of late shifts. We checked line pressure & governor pressure & they both are within range. We checked the pan and filter for debris and there really was nothing out of the ordinary. Went ahead and serviced the trans filter etc....
1997 Chevrolet C3500 6.5L loads of blake smoke VIN: 1GDJ034F5V
I'm sure a tech2 would show more but all I have is the red brick. I can get it to smoke out the shop while brake torqueing. Here is the scan data and no codes. idle 1500 app1 .68v 1.35v app2 4.30v 3.61v app3 3.96v 3.59v app% 0 23 timing 12.1 12.3 tdc offset -...
2000 Chevrolet G3500 7.4L alignment VIN: 1GBJG31J6Y
also used severe duty brake pads and seem to have rotor wrapage problem,we are going to do away with severe duty pads and replace rotors
2000 Chevrolet Tracker 1.6L MIL Lamp on VIN: 2CNBJ1860Y
Hello Gents,I've got this Tracker with a intermittent code that seems to only set when on long drive?My Customer had no time to let run more tests other than clear code.I was able to run a output test with Tech 2.When in output test the duty cycle would increa... Trouble codes: P0400 (egr flow error)
2002 Chevrolet Venture LS 3.4L engine electrical VIN: 1GNDX03E22
hello fellow tech's i have a strange problem with a 2002 chevy venture that came into the shop. it was a used car that was sold and now has this problem. 6 months later the abs and srs lights on the cluster will come on and then go off while driving. does not ...
1988 GMC C1500 Sierra 5.7L Cuts out VIN: 1GCDC14K3J
Hi guys I have a nightmare on what is usually a very simple trouble free system. Customer brought truck in claiming it cut out at times. He had had new fuel pump, fuel filter, wires, plugs, cap, and rotor installed, Scoped truck and found ignition pattern was ...
1991 GMC C3500 Sierra 5.7L Right outer Tie Rod End VIN: 1GDKC34N2M
Can not locate the right outer tie rod end. Tried after market (moog, napa etc) and tried dealer. Any help even a GOOD used one will work!
1997 Oldsmobile 88 Royale 3.8L Misfire, MIL Lamp on VIN: 1G3HN52KXV
Yhis car has all of us baffled misfire counter for #6 cyl climbs high and does misfire. Have tried (yes I threw parts at it ecspecially after commons were out) spark plug, cable, 3x6 coil, reman fuel injector, used pcm. Engine misfires at idle and if throttle ... Trouble codes: P0300
1997 Oldsmobile Aurora 4.0L Misfire VIN: 1G3GR62C0V
Ok, this one is eating my lunch. Have a misfire on cylinder number 6. All other cylinders good. Misfire does not follow ignition wire, coil, or injector when swaped. Installed a new plug first thing. Do these vehicles have any problem with intake manifolds or ... Trouble codes: P0300
1987 Pontiac Firebird 5.0L Excessive Emissions, Poor Idle Quality, Stall VIN: 1G2FS21F5H
Good evening fellow techs. I am having a problem with this vehicle when it first came into me the idle would go up to 1500 rpm all on it own while idling foud electronic diverter valve bad replaced that the idle came down iac counts around 28 before iac count ...
1999 Pontiac Grand Am SE 3.4L tcc solenoid VIN: 1G2NE52E9X
Vehicle come in for code 1860b tcc solenoid, also stalls out when coming to stops, code is a hard code comes on right after clearing out, replaced tcc solenoid and also replaced both shift solenoids while in there, code comes back right away, pulled cover back...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L crank no start VIN: 1G4CW52K5S
This one was the E.C.M. I had many people give me many tests, some I had already done, but it was the E.C.M. The dark blue wire going from E.C.M. was not giving it's signal to the Anit Theft Deterent Module to turn on the fuel pump and injectors. Thank you for...
1948 Chevrolet Truck 350CID No Start
I did receive lots of replys on this. I installed new module and new noise suppressor. Most replied that it must be ground fault. We made some new ground connections to engine. But only time will tell if that does the trick. The problem takes 3 to 4 month to h...
1968 Chevrolet Camaro 5.7L Excessive Emissions, Poor Idle Quality, Surge, Stall VIN: 123378N408
Unbelievable. It's so funny how we sometimes miss the simplist things. Thanks to all for the information you sent me, I now know more than I ever wanted to know about LT1s. The problem turned out to be pinched fuel lines from the tank. The owner had asked some...
1991 Chevrolet Camaro RS 5.0L Hesitation VIN: 1G1FP23E9M
REplaced EGR with one from dealer. Computer turned on EGR at 77 degrees which is within spec, but it was too much for the vehicle to handle when cold. When vehicle warmed up issue went away. Vacuum solenoid and back pressure, transducer operated normally. Fuel...
2001 Chevrolet Suburban 1500 5.3L Poor Idle Quality, MIL Lamp on, no throttle response VIN: 3GNEC16TX1
thanks for all the advice. we replaced the throttle actuator motor first and the throttle actuator module second. neither of these helped the problem. we were still having the exact same problem and the same code. we finally tossed a coin and replaced the pcm.... Trouble codes: P1518.
1996 Oldsmobile LSS 3.8L Stall VIN: 1G3HY52K3T
Thanks to everyone for the help. We tested the fuel pressure regulator several times and did not find a problem with it even with a vacuum pump hooked to it things looked good. Finally we caught it leaking after the engine ran just a few minutes. Changed the r... Trouble codes: B1023, B1035.
1999 Oldsmobile Silhouette Premiere 3.4L abs warning light VIN: 1GHDX03EXX
Found the problem with the vehicle. My OTC Genisis was giving me the wrong code (c1265). With the OTC scanner when looking up ABS codes you get three ways to find a code. My vehicle had the ABS and TCS lights on. I started with the ABS system then the scanner ...
1998 Pontiac Trans Sport Montana 3.4L abs tcs VIN: 1GMDX03EXW
Checked connecters ok. When vehicle is hooked to a computer and you start it no lights come on when you disconnect the computer the lights turn on. Planning to send it to dealer tommorrow. Thanks for your help. Luke
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