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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 13, 2005
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K2V
Re-curring evap code P0446, evap system cansiter vent blocked. Clear code, customer drives car for 2 days and the MIL comes back on in exactly the same spot at exactly the same mileage every time (this only happens to him, we have driven the vehicle several mi... Trouble codes: P0446 (evap system canister vent blocked)
1997 Buick LeSabre Limited 3.8L Speedometer VIN: 1G4HR52KXV
Customer brought vehicle to be checked for speedometer not working. Started to work shortly before he got to shop. Test drove with scantool and monitored. Would not act up. Has been this way for a month. Works about half of the time. Will come and go while dri...
2000 Buick Regal LS 3.8L HVAC Display VIN: 2G4WB52K2Y
This vehicle has a HVAC(dual zone) digital display that is not operating. All of the other functions operate and illuminate properly on the control head. What I am looking for is the information and parts to repair the display instead of replacing them all the...
1989 Chevrolet K2500 Cheyenne 5.7L rocker arms VIN: 2GCFK29J0K
The engine is a reman from D+J Machine and performance engines in Phoenix. It is a 300hp 350ci TBI engine I believe listed on e-bay. New valve springs(dual),clevite motorsports cam with .488 lift at the valve,1.6 stamped rockers, heads are 305ci small valve ca...
1992 Chevrolet G20 Sportvan 4.3L MIL Lamp on, running lean VIN: 2GBEG25Z1N
This Vehicle came in with a check engine light on and a quick scan showed a CODE 13(o2 SENSOR OPEN,SHORTED OR BAD.) I replaced the o2 sensor and cleared the code and let the vehicle go...and lo and behold it came back and you guessed it...the light was on and ... Trouble codes: 13
1992 Chevrolet Cavalier Z24 3.1L Rear Brakes VIN: 1G1JF14T9N
Hi Guys! Its me again. We have this Cavalier with the rear brakes locking up and the front brakes not operating as well as they should. We don't usually deal with ABS and I'm stumped. We had one like this some time back and had replaced almost everything but...
1995 Chevrolet S10 LS 2.2L Spark knock VIN: 1GCCS1942S
This truck has a problem with spark knock. It knocks horrible at cruise speeds above 60mph. Tip into the throttle while it's knocking and the knock goes away. As soon as it catches up it begins knocking again. I can't seem to find the issue. I have to run prem...
1998 Chevrolet Lumina LTZ 3.8L Alternator VIN: 2G1WN52K0W
This vehicle will NOT charge until at least 200 degrees operating temp, and RPM close to or over 2000RPM to enable the Alternator to "Engage". If I let it just idle, it will not charge. The Genisys is showing the "COMMANDED GEN" as "ON", but it isn't charging....
1998 Chevrolet K1500 Cheyenne 5.7L passlock tds
Hi Everyone, Have a 98' chevy k1500 p/u in the shop that was towed in as a no start. Security light was flashing when i tried to crank it over.The engine would start and then die immediatly. I hooked the mastertech scanner up and saw no I.P.W. during cranking...
1996 GMC C1500 Sierra SL 5.7L Electronic VIN: 2GTEC19R7T
customer installed a stereo with dual batteries, disconnected one of the batteries and the positve cable grounded and burned up alternator charge wire to secondary battery. fixed that mess and found that when transmission is placed in D,3,2 Transmission feels ...
2000 GMC Sierra 1500 SL 4.3L ABS Light VIN: 1GTEK14W0Y
Following bleeding of system. ABS light goes out after startup. Then comes back on. OTC scanner showed I believe a past stored code for the left front wheel speed sensor. But thought to myself ... I'll clear it ... and run the vehicle and see if it resets. The...
1991 Oldsmobile Cutlass Ciera SL 3.3L No Start, Cuts out, Stall VIN: 1G3AM54NXM
customer brought vehicle to me complained that vehicle would not idle. it sat for at least a year, wanted something more fuel efficent. can get the vehicle to run at times and even idle for five mins or so but will stall and not fire for several hours. vehicle...
1997 Oldsmobile LSS 3.8L dash lites VIN: 1G3HY5211V
car has made the route ,three different shops. has no dash lites or radio display ,when headlites are turned on either manually or automaticly .G.M.dealer checked it out and told him it was an auto dimming module ,customer replaced it no change ,so if any one ...
1980 Pontiac Firebird 5.0L Shifting Points VIN: 2X87TAN135
I have numerous problems with shift points on this Non Lockup turbo 350 Transmission. Clutches Bands and Engagement are all Excellent - I am able to get all three gears to screetch. The problems are as follows. Manual First does not stay in first it short shif...
1995 Pontiac Bonneville SE 3.8L engine VIN: 1G211252K5
Thanks in advance I was hopeing someone else has run into this problem. The noise sounds like a belt noise. I have removed the drive belt with no change. I am supecting the balance shaft. If anyone has ran into this before it would be very helpful..
2001 Pontiac Grand Prix GT 3.8L Surge, Misfire VIN: 1G2WP52K21
help me i'm an ex gm tech. no ses light the vehicle only misses go up a mountain with light thottle at 50 mph with tcc lock up and misses looking at the mt2500 on all 6 cyl going down a flat road its not noticed. the customer lives on the mountain. the tcc cut...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick LeSabre Custom 3.8L abs electronics VIN: 1G4HP53L9P
Sorry guys this car left the shop and has not yet returned for more diagnosis.
1992 Chevrolet G20 Chevy Van 5.7L No Start, Cuts out, Stall VIN: 248A7RVL81
i checked the dist was not the problem but thcnk you for the advise. what i found after bout 4 hrs off beating my head is some boob installed a napa battery and when they did they pushed it against the wiring harness to the firewall and it rubbed threw the ora...
1997 Chevrolet Monte Carlo Z34 3.4L vacuum system VIN: 2G1WX12XOV
Thanks, for the help but Hurricane Katrina came and everything is closed down for a while. I don't know what happen to the customer. I will post again if he returns. Thanks
2000 Chevrolet Monte Carlo LS 3.4L engine VIN: 2G1WW12EXY
This vehicle appears to be fixed. Never did I think about doing a running compression test. Running compression was about 20 psi, with nonrunning being 125 psi. Replaced cam and lifters for cyl. #6 and misfire gone and MIL off. Also, did not realize this was a...
2003 Chevrolet Express 3500 6.0L A/C Belt Tensioner VIN: 1GBJG31U63
Once again, you guys exceeded my expectations on the responses I received. I did find the TSB that was referred to in many responses, I guess I had overlooked it due to my noise occurring on decel and the TSB title indicated noise on accel. All thirteen replie...
2000 GMC Safari SL 4.3L Surge VIN: 1GKEL19W3Y
We have checked all of the coponets, we came up with an internal trans problem,customer said they want leave it as is for now Thanks for all your help, Jim.
1995 Oldsmobile Cutlass Ciera 3.1L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G3AJ85M3S
well only had 3 replys and all were wroung i got into wave form library and found a good wave form and after putting new harness from module to rear crank sensor and an ecm from bone yard that sold car still had same problem so i backed up again and put lab sc... Trouble codes: P0341.
1997 Pontiac Sunfire SE 2.2L engine VIN: 1G2JB5241V
thanks for all the help. i finally figured this one out. the problem was the aftermarket timing chain set had the cam timing mark in the incorrect location. installed timing chain from gm recheck compression 150 psi+ on all cylinders car starts and runs great....
1999 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR5211X
hey guys, we found out what the problem was.when we originaly checked compression, it red 175 all holes.THE INTSKE CAME OFF AND AT THAT TIM [...] WE CHECKED THE REAR HEAD FOR BROKEN SPRINGS BUT FOUND NONE .afetr replacing the intake gasket beacuse of a the smoke te... Trouble codes: P0300.
2000 Pontiac Grand Am SE 3.4L Misfire VIN: 1G2NF52E51
Another one to mark up as fixed (and cheap $$ repair too). Thanks to all you who hit the nail on the head and have seen this very problem. I ended up trying the cheapest thing possible... cleaning the injectors. At work we use the WYNNS products and so I had a... Trouble codes: P0300.
2004 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB12FX4
well this one is fixed as some of you suggested i did 2 injection flushes due to bad fuel, its outa here! i want to thank all who replied you saved me . you guys rock thanx
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