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Prev Professional Automotive Repair Technical Discussions for October 31, 2007
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Open Help Requests for GM
Help Request Answers
1977 Chevrolet K10 Cheyenne 5.7L fuel gauge VIN: CKL247J187
I have a truck with duel gas tanks, mechanical pump. I am having a hard time finding schematics for this one. Customer doesn't use the left tank and just wants the gauge to work on the right one, sounded easy until I got underneath it. What a wiring nightmare....
1986 Chevrolet S10 2.5L Stall VIN: 1GCDT14R2G
this truck will stall intermittently when comming to a stop or making a turn. basically when the clutch is depressed or the trans is put into neutral. this stalling occures after 10 to 15 min. of drive time. it doesnt matter if the vehicle is cold or hot. the ...
1996 Chevrolet Blazer 4.3L transfercase VIN: 1GNDHFYRRM
hi there all you gm guys was woundering if any has ever tried to change a all wheel drive transfer case chain with the unit still in the vehicle and if so how hard is it
1997 Chevrolet K1500 Cheyenne 5.0L No Start VIN: 2GCEK19M6V
this ones driving me crazy ,hopefully someone outthere in tech land can help this truck broke down on the road .the owner noticed it had no spark so he put on a new coil ,then an ic modual, then cap and rotor still no spark .towed to us ,thanks ha ha i checked...
1997 Chevrolet K1500 5.7L transmission? VIN: 1GCEK19R5U
First I will attempt to describe the issue in as much detail as I can. This vehicle was recently purched used. Any time the vehicle is accelerated to hiway speed (rapidly or softly), shortly after you level off the speed ,(approx. 5 seconds) the truck "bucks" ...
1997 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 3GNEC16R2V
First code in system was the P1133. replaced bk 1 sensor1. After drive cycle,second time of driving lite came on with code P1153 in system. Changed bank 2 sensor 1. Test drive and code P1133 came back. Now has PO133,P1133,P1153. Computer has latest update. Che... Trouble codes: P0133, P1133, P1153
1999 Chevrolet Cavalier 2.2L abs controler VIN: 1G1JC5243X
On dry pavement stop sounds like the motors in the abs controler are actvating on the scanner you can see the left and right solnoids are going on and off The left and right and rear motors reading are at 0.16 amps. when appling the brakes and the clicking noi...
2001 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF55E01
ok here it is. sister brought car in for emission inspection. check engine light was on. had code p041 b1-s2 o2 sensor heater circuit malfunction. replaced rear oxygen sensor cleared code and test drove to reset monitors. after 3 days still had 3 moitors inclu... Trouble codes: P0141
2005 Chevrolet Impala 3.8L low fuel message VIN: 2G1WF55K45
I replaced the motor in this car because it had internal damaged. I disconnected the wiring harness from the pcm, cruise control module, abs module and power distribution plug on the right side. Dropped engine cradle and everything out of the bottom. The negat...
1993 GMC C1500 Sierra 5.7L Cuts out, Stall VIN: 2GCEC19KSP
Well this is one of thoughs needles in a hay stack that you should not take on. I have run over a tank of gas through this unit and it has only acted up twice for a very breif moment. I have a fuel pressure gauge on at all times and a spark monitor on the wind...
1994 GMC C3500 Sierra SL 7.4L manifold glows red VIN: 1GDJC34N0R
local driving no problem with mainifold, take truck on highway over 50 mph for 20-30 min, manifold gets red hot.
2002 GMC Envoy SLE 4.2L Parking brake VIN: 1GKDS13S62
This envoy failed inspection due to parking brake not holding. If I pump the lever a few times it feels ok and will hold the vehicle. If it is driven 2-3 miles you can pull the lever all the way up and wont hold. I suspect the auto adjuster problem. We work on...
1990 Oldsmobile Cutlass Calais S 2.3L engine VIN: 1G3NF14A6L
hello everyone, we have a quad 4 a series mystery that it causing us misery, vehicle ran great after we replaced timing chain,tensioner guide test drove no problem, vehicle came back cutting off after driving and when it reaches closed loop start tapping like ...
1997 Oldsmobile Achieva S 2.4L security VIN: 1G3NL52T6V
We have this Olds Acheiva that we replaced cluster on 7 weeks ago because it was dead(inop), now the security light is blinking and we cant get to disarm, even unlocking drivers door, owner has no key fob. Is there a way to disarm system without a key fob, a t...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Chevrolet C2500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1GKDT13S02
i [...] like to thank every one that help with this truck it was in the evap purge line it was sucking gas up the hose under high engine vac Trouble codes: 45 (rich exhaust).
1991 Chevrolet C60 Sch Bus 366CID Poor Idle Quality, Hesitation, Surge, Stall VIN: 1GBJ6P1P4M
The wrong fuel pump was installed. Our parts supplier assured us we had the correct fuel pump for this vehicle. After some research we found that this was the wrong pump. Original pump we installed was rated at 9-13 psi, the correct pump was 26-32 psi. Side by... Trouble codes: 44 (O2 Sensor Lean Condition).
1995 Chevrolet S10 2.2L Misfire VIN: 1GCCS1442S
Sorry it took so long to get back to all who replied. The time I had this post opened the customer was using this truck for getting around until I had more to go on. He came back a week and half later with credit card in hand saying I fixed his truck after al...
1998 Chevrolet S10 2.2L Stall VIN: 1GCCS1444W
We have not found the fix for this vehicle. It still appears to have a computer problem / VATS problem. It pops code U1016 with the used replacement computer and only runs a few seconds before shuting off. With the original computer it runs very very rich with... Trouble codes: U1016 (loss of class two communication), P1629 (no fuel enable signal).
1998 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1942W
thanks for all the help..most said check plug @ EGR...craziest thing happened in the meantime though...lost transmission!! so...until customer decides if hes going to keep this thing or not we'll have to put it on hold...thanks for your generous help Trouble codes: P0404 (egr valve pintle position open), P0405 (egr valve sensor signal low).
2001 Chevrolet Silverado 2500 HD 6.0L MIL Lamp on VIN: 1GHK24UX1E
Thanks for all the help guys. The crank -cam relearn fixed it immediately. I dont know why it needed this, no engine work had been done. However, it did have a tranny overhaul done at another shop and the false misfire code started soon after. Trouble codes: P0300, P0301, P0306.
2001 Chevrolet Silverado 1500 5.3L starter VIN: 2GCEC19T71
customer did not approve service, i advised the customer that the problem was probably his aftermarket alarm since everything else checked out good & he took the car where the alarm was purchased.
2001 Chevrolet Suburban 1500 5.3L 2-3 Shift VIN: 3GNFK16T31
Well guys thank you for all of your help. Unfortunately I was unsucessful in finding out the root cause. Checked for Pcm updates and could not find one that was related to my problem. Took vehicle to another local shop and we together went through all possible...
2005 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AL12F45
Thanks guys. Danny was right we had overlooked the low speed side of the circuit. We checked the diode before post and it was good. With Ed's suggestion we installed the new harness. Bottom line it was a 30amp fuse. We did not have much info on this and assume... Trouble codes: P0480 (Coolant Fan 1 control circuit).
1999 GMC Yukon Denali SLE 5.7L 4wd VIN: 1GKEK13R7X
Hello Friends and fello iatn members,and a special thanks to Matt,Fermin,Morgan,Wallis,James,Kris, andTRAUTOMOTIVE. well we replaced the switch and still had no 4x4 but noticed with the truck on the lift and running, the new encoder motor was makeing a clickin...
1964 Pontiac GTO 389CID fuel gauge
Thank you everyone for your replies. Here is what I found. I had 8.0 volts at the sending unit, and I had a good ground. I know this because I cleaned and added another ground to verify. I did sweep the sending unit before installing and it gave me odd resu...
1985 Pontiac Fiero SE 2.5L Poor Idle Quality, Surge, Stall VIN: 1G2PF37R7F
I apologize in the delay in closing this help request. Randy, Michael, Phillip and Adam were right on, the problem was the egr valve. The cars runs great, at least as good as it used to! Thankyou to all who took the time to share some good ideas and point me i... Trouble codes: 44 (lean exhaust).
1997 Pontiac Grand Prix GTP 3.8L No Start, Cuts out, Stall VIN: 1G2WP5214V
Well this vehicle is not fixed. Richard mentioned the resistor, it has been done. With Modus did amp output test, signal perfect, not a fuel pressure problem. Removed ecm no signs of defect check engine bulb was out, changed that. No codes---Did test Dan fro...
1999 Pontiac Bonneville SE 3.8L fuel pump VIN: 1G2HX52K4X
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