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Prev Professional Automotive Repair Technical Discussions for November 26, 2007
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Open Help Requests for GM
Help Request Answers
1990 Chevrolet Corvette 5.7L No Start, Poor Idle Quality VIN: 1G1YY2382L
car came in first for rough idle & die at stops some times, found egr code in computer & bad egr valve, replaced the valve car was picked up and driven for one day nice with no problem, next day car did n't start, when it got towed in started but rough idle, c...
1995 Chevrolet Corvette 5.7L No Start VIN: 1G1YY22P9S
I sure could use some help here...usually I'm giving help, this time I'm asking...I'm getting mine handed over to me on this one. It has spark,fuel pressure, but very random(at best)injector pulses.Sometimes just one per crank cycle, sometimes several, but ran...
1998 Chevrolet K2500 Cheyenne 5.7L No Start, Cuts out VIN: 1GCGK24R6W
we have this '98 k2500 that keeps coming back with a fuel pump problem. a couple times it died going down the road but restarted right away, then flat out refused to start. pump wasn't running. we replaced fuel pump, filter and customer had replaced the relay....
2001 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCDM19W11
The van came back 2 weeks ago for misfire and running bad. I check codes. P0300 and P0335 were in computer. I change crank sensor. No change still have misfire and crasnk code. I have since then removed upper intake inspect gasket and look to see if there were... Trouble codes: P0300 (Misfire), P0335 (Crank Sensor)
2001 Chevrolet Suburban 1500 5.3L electric window VIN: 3GNFK16T61
vehical came in with drivers power window not working and passenger front window won't go up from drivers switch only. passengers window works from passengers switch. replaced master switch on drivers side and passengers window worked properly. replaced the mo...
2002 Chevrolet Monte Carlo SS 3.8L keyless entry VIN: 2G1WX15K82
does anyone know the procedure to program keyless entry remotes for 2002 chevy monte carlo?
2003 Chevrolet Trailblazer LT 4.2L lifter VIN: 1GNES16S43
Lifter noise on cold start. After sitting overnight, on cold start up, the engine misses and the lifters tick loudly. After running for about 1-2 minutes, it clears up and no noise or miss until it sits over night again. Has anyone run into this before?
2004 Chevrolet Tahoe LS 5.3L temp VIN: 1GNEK13Z24
I have this Tahoe that won't reach operating temp.Truck came in for no heat,had barely any coolant in it.I replaced the surge tank,filled coolant,test drove,could not get over 160 deg F.Front was now blowing pretty hot air,but the rear air was only luke warm.I...
2004 Chevrolet Suburban 1500 Z71 5.3L power seats VIN: 1GNFK16Z84
Hope everybody had an enjoyable holiday. I have a suburban with what I believe to be a 6way power seat. It has a vertical seat motor a horizontal seat motor and a seat recline motor. It also has a lumbar built in. It does not appear to have any yellow wires un...
2005 Chevrolet Silverado 1500 4.8L alternator/charge module VIN: 1GCEC14V85
Battery was drained while in shop due to key on and vehicle had to be jump started. Charging system now not operational not able to see duty cycle in pids on scan tool for charging system module. Unable to test Alternator and was fine on arrival. Is this charg...
1995 GMC C7000 Topkick C7H042 6.0L Excessive Emissions, Poor Idle Quality, Surge, Stall, Poor Fuel Economy VIN: 1GDL7H1P6S
first time needing help on a gm vehicle. have 4 hours invested in this vehicle. The vehicle is a 1995 top kick hd truck, with a chevy 6.0liter, not something I would normaly work on. Only problem is that the truck runs extremly rich at idel and at 3,000 rpm. c... Trouble codes: 45 (rich exhaust), 13 (oxygen sensor open shorted or bad)
2000 GMC Yukon XL 2500 SLE 6.0L door locks VIN: 2GKGK26UXY
Hello, I have a Yukon with inoperative power door locks and a body code B3148. The B3148, from memory means there is high voltage on the unlock relay circuit. This has been confirmed with and without the BCM connected I have 12 volts on the Unlock side at all...
1995 Pontiac Grand Am SE 3.1L Temp Guage VIN: 1G2NE15M9S
Having engine temp problem from initial start up. Customer starts unit and drives 15 miles to work and temp guage goes into the red and then comes down to normal if he turns it off and restarts it. Kinda like the thermostat opens finaly. This started a few wee...
1997 Pontiac Grand Am GT 3.1L no power VIN: 1G2NW52M8V
car came in for lack of power, removed exhaust, felt like it was plugged, that was not the issue,thought maybe mass air flow, but that was not the problem, fuel pressure is okay, does anybody have any suggestions

Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet G20 Chevy Van 5.7L No Start, WITH ESC PLUGGED IN VIN: 2GBEG25K0M
Thanks for all that took the time to help. The problem ended up being the prom. The distributor and reluctor tested good but we installed a known good unit just to make sure and it still had the same problem. We lucked out when we had to go to the local pic...
1991 Chevrolet V1500 Suburban Scottsdale 5.7L Misfire VIN: 1GNEV16K1M
Hey everyone, thanks for all your replies, unfortunatly the customer had to take this vehicle he is going to bring it back and I will follow up on this, just didnt want to keep this post open for too long
1995 Chevrolet Blazer 4.3L No Start, Hesitation, Surge, Cuts out, Stall, intermittent no star VIN: 1GNDT13W2S
Thanks to the many whom have contributed to a successful repair of the fuel system on this 1995 S10 Blazer 4X4. Most suggested a problem with the fuel injectors, fuel pressure regulator or fuel pump either leaking or not working sufficiently. Please note t...
1997 Chevrolet Astro 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDM19W7V
i had this van a 3 different shops they all had no luck with it. thanks for all the responses. i still have the van here but customer says take your time. i will work on it when it is slow. thanks again. dave
2000 Chevrolet Cavalier LS 2.4L No Start VIN: 1G1JF52T1Y
A new PCM fixed this one. Several of the replies I received advised thoroughly checking the computer grounds. I had already visually inspected the ground points on the trans. bell housing, and also supplied an auxilliary ground, with no improvement. I apprecia... Trouble codes: P0336 (CKP Sensor Out of Range), P0621 (Generator Lamp L Circuit Control), U1000 (Class 2 Serial Communication Problem).
2000 Chevrolet Blazer LS 4.3L No Start, hard start VIN: IGNDT13W3Y
after letting truck sat over the weekend i pulled the spark plugs found spark plugs fuel fouled cust did not approve putting fuel inj in the inj poppets were leaking will post after cust come back for repair thanks for all the help!!!
2001 Chevrolet Silverado 2500 HD 6.0L ignition VIN: 1GBHK23U21
most replies to this said it was the passlock. i did the procedure that alldata described for this vehicle. vehicle started right after third sequence. thanks for all the help
2001 Chevrolet Express 3500 6.5L fuse #18 keeps blowing VIN: 1GCHG39FX1
like some of you suggested i separated circuit into sections,when i removed the cruise control from that fuse circuit, the short never happened,unfortunately the customer is happy with it like that,i suspect the cruise switches are the likely cause, but the cu...
2001 Oldsmobile Alero GL 3.4L Misfire VIN: 1G3NL52E11
We suspected the injector on # 1 cyl as the culprit so we pulled the plenum & immediately saw that the injector connector was broken & not plugged in correctly. We did a history search & found that long ago we had a security issue with this vehicle & we had un... Trouble codes: P0300 (Random Cylinder Missfire- 1 cyl missfires intermittantly).
2000 Pontiac Grand Am SE 3.4L Cuts out, Stall
Well I thank everyone that replied, in all the time that I have workrd on the 3.1-3.4 V6s from GM i have yet to see a bad cam position sensor, changed this one and the vehicle is fixed. Hope everyone had a great Thanksgiving. Zim Trouble codes: P0341 (Camshaft Position Sensor Performance).
1996 Saturn SC2 1.9L enigine VIN: 1G8ZH1270T
removed the timing cover cleared oilo passage removed oil pan cleaned pick up tube and pan repaced timing chaun tensoner and put back together tick gone thanks for the help.
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