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Prev Professional Automotive Repair Technical Discussions for March 17, 2006
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Open Help Requests for GM
Help Request Answers
1992 Buick Regal Custom 3.8L Coolant VIN: 2G4WB54L5N
This vehicle came in with a badly leaking water pump. We discovered oil in the cooling system. The radiator had about 4 inches of chocolate cream at the top. The freeze plugs are all corroded and leaking a little. I figure it must be oil under pressure leaking...
1997 Cadillac DeVille d'Elegance 4.6L Starting VIN: 1G6KE54Y6V
This vehicle had been idle for about 6 months. No prior problems. Now very difficult to start when cold. You have to depress the accelerator slightly while cranking then it starts to "pop" a few times and suddenly roars to life. It starts instantly when warm. ...
1998 Cadillac Eldorado ESC 4.6L air ride VIN: 1G6EL12Y3W
Have a problem with this car,the air ride will not lower. Has no codes for air ride,has only one level sensor. It goes up but will not lower. No rerpairs yet on car will be working on it Monday morning . Has anybody have had a problem like this. We dont do a...
1975 Chevrolet Caprice Classic 6.6L Misfire after rebuild VIN: 1N69U5J185
Hello everyone and thanks in advance for the help on this one. This customer loves his 75 Caprice, but it was takin oil at a heavy rate. We removed the 400 put rings, bearings, cam, lifters, and a valve job into it. In my life, i have done many many such rep...
1991 Chevrolet K1500 Cheyenne 5.7L torque convertor clutch VIN: 1GCDK14K9M
Good Afternoon fellow techs, This one has me totally stumped. Car came in with complaint of no lock-up, road test confirms. Scanned PCM and found 4th gear switch closing but no tcc enable. Found all values on sensors eg. vss, map, cts, etc. ok except for knoc...
1992 Chevrolet Lumina 3.1L Stall VIN: 2G1WL54TXN
customer complains of vehicle stalling intermittently, but always restarts, found ckp cracked and replaced it, thought that would solve problem, but customer was back a couple of weeks later with same problem. customer states once vehicle stalls the first time...
1994 Chevrolet K1500 5.7L Poor Fuel Economy, MIL Lamp on VIN: 2GCEK19K9R
vehicle will trip mil code 44 present. found leaking intake gasket and replaced also replace oe o2 sensor with new sensor. code 44 still present. Trouble codes: 44 (lean exaust)
1996 Chevrolet K1500 Cheyenne 5.7L no decell VIN: 2GCEK19R8T
This truck runs perfect and has no fuel mileage issues, but will not go into lean decell. There are no codes and the exhaust gas readings are very clean. If the battery is disconnected or PCM fuses removed for 30 seconds, it will go into lean decell for about ...
2001 Chevrolet Blazer LS 4.3L SAI and monitor woes VIN: 1GNDT13W51
Help! This Blazer won't pass NY's scan-based emissions test because some monitors won't run. Another shop had attempted to fix the secondary air system. They replaced a blown 30a fuse and installed an extension on the inlet side of the air pump, to get the in...
1993 GMC Jimmy SLE 4.3L Poor Idle Quality, Surge, Misfire VIN: 1GDCT18ZP0
This Typhoon came in for a rough running complaint. Scope testing ignition did not turn up any problems. scan data stream seems normal except block learn is all over the map as the engine runs.cylinder balance test shows at idle #6 cylinder about 65% ,and at 2...
2000 GMC Sierra 1500 SL 4.8L eratic VIN: 1GTEC14V7Y
this trucks gas gauge is very eretic hardly ever reads right usealy reads empty anyone else had this proplem???
2002 GMC Jimmy SLS 4.3L Bleeding VIN: 1GKDT13W22
hello the vech cam in with a bad pull. found the right front flex hose collapsed. repalced it and tried to bleed the system.. i cant get fluid from the right front caliper. all the rest are normal. the i checked the line for clogging, it is good. the pedal was...
1987 Pontiac Fiero GT 2.8L streeing stability VIN: 1G2PG1192H
Hello fellow techs, We have a customer with a Fiero that on the highway, over certain types of bumps, will go into a steering wheel shimmy, much like you would see from a bad steering dampener. The customer replaced it himself trying to fix this problem. We lo...
1995 Pontiac Grand Prix GTP 3.4L base brake VIN: 1G2WJ12X3S
I've got the GM blues!Car came in with poor braking and fluid leak,front bleed screw was loose ,tightened-up,tried bleeding all brakes,no fluid from rears,diag and replaced modulator which came with new master(used),fluid comes out great from rears now,test dr...
1996 Pontiac Grand Am SE 2.4L Hesitation, Misfire
hey guys, this one has a misfire only off idle under load. came in with new pressure reg. and new plugs. has random misfire set. fuel pressure and volume is good. i removed coil cover and hooked up some spark plug wires in place of coil boots. still misfires o... Trouble codes: P0300
1998 Pontiac Sunfire GT 2.4L No Start, Hesitation, Stall VIN: 3G2JD12T3W
Well techs this one is odd, vehicle came in as a no start, so first thing I did was check for codes , only found one P0335, ckp circuit found no codes for theft, upon checking flow charts in alldata problem pointed to crank sensor, we also had no RPM on scan t... Trouble codes: P0335
2001 Pontiac Montana 3.4L No Start VIN: 1GMDX03E21
First I checked codes,found the 1626 so I checked the fuses first. I found the headlight maxi-fuse was missing.I replaced it and it started. When shut off it wouldn't start,But with the key on I pulled the fuse(headlight maxi)and replaced it.The vehicle starte... Trouble codes: P1626

Fixes & Summaries for GM
Fix/Summary Answers
1967 Cadillac SEDAN DEVILL 429CID front shoe/drum
Morning every one! I got a lot of good help on this one. Richard [...] gave me some good tips. We ended up trying nearly all suggestions, checking and rechecking, and putting the finest finish possible on the drums. We even tried shimm...
1995 Chevrolet Lumina LS 3.1L passkey ii VIN: 2G1WN52M0S
Thanks everyone for your quick and informitive responses.After removing the lower dash panel I noticed that the passkeyII wires at the connector had the insulation pulled back and were almost touching. Just a little wiggle of the wire would cause a no start. W...
1995 Chevrolet Lumina 3.1L rocker arms/studs VIN: 1234567M-S
I'm sorry for the delay but I've been under the weather. I did receive alot of good advise, anywhere from wrong cam to lifters pumped out causing rocker arms going full travel and snapping the rockers or studs. This only snapped the intake only and never the s...
1996 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W7T
Well I would like to thank all that responded to my request. Russ, Troy and Toobadnext pretty much nailed it. Even though the cranking and running compression were good I couldnt find a reason for all the deposits on the #3 plug. I finally pulled the head and ... Trouble codes: P0300 (Random Misfire).
2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S24
Hi Everyone! Sorry my fix is late the customer went on vacation and I didn't get the vehicle until this week. I was able to turn on the air pump with my scan tool. I noticed that the air pump sounded loud and somewhat labored. I disconnected the vacuum line fr... Trouble codes: P0410 (Secondary Air Injection system).
1999 GMC Sonoma SL 4.3L abs VIN: 1GTC514X1X
First of all we should all know KISS-- keep it simple stupid, after throwing about 1800.00 worth of parts at this truck, we went back to the basics. The fix ended up being rear brake drums, they were .120 oversize which equaled about 1/4 of an inch of adjustme...
1998 Oldsmobile Bravada 4.3L MIL Lamp on VIN: 1GHDT13W3W
replaced o2 wiring harness on right side frame and vehicle is doing well, thanks all those who replied. Trouble codes: P0135, P0147, P0155, P1153 (insuffcient switching of o2s).
1999 Pontiac Firebird 3.8L No Start, Poor Idle Quality, Cuts out, MIL Lamp on VIN: 2G2FS22K8X
hi thanks for all your help,after looking at car my self & testing tac & tps found car had a bad tps switch. witch you may know on this car it is not serciveable.with out replaceing the hole tbi unit.after replacing the unit the car runs & idles fine Trouble codes: P0171 (fuel sym to lean bank 1), P0174 (fuel sym to lean bank 2), P1336 (ckp sym variation not learned), P1514 (airflow to tps correlation to high), P1106 (map sensor ckt intermittent high).
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