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Prev Professional Automotive Repair Technical Discussions for February 7, 2014
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Help Request Answers
2002 Chevrolet Tahoe LS 5.3L No Start VIN: 1GNEK13ZX2
Vehicle will crank but not start. Happened one time in the shop. Fuel pressure is at spec and when I put a spark tester on it fired right up and unable to duplicate complaint. Customer states it will crank and not start, then 1 hour later he'll try again and i...
2004 Chevrolet C5500 Kodiak C5C042 6.6L Throttle VIN: 1GBE5C1114
Two troublemakers in the same week!! This is our farm service truck and its a good time to get everything working right. Pto switch on the dash is factory has upfitter switches under dash for the crane and compressor PTO. Everything works OK but the engine won...
2006 Chevrolet Aveo LS 1.6L MIL Lamp on VIN: KL1TD66626
egr percent reading at idle or key on engine off always sits at 16%.does not change until i get to 40% on scan tool,then goes to around 32%.idle drops and gets rough.i cleared codes twice,disconnected batt.touched cables together with no change.thank you in ad... Trouble codes: P1404 (Egr sensor)
2007 Chevrolet Suburban 1500 Z71 5.3L Wont accel VIN: 3GNFK16317
Car came in for no power and transmission not slipping. found trouble code for Accelerator Pedal Position (APP) Sensor 1-2 Correlation. upon test drive found that car will only go around 20 mph then transmission will down shift like you pushed accelerator down... Trouble codes: P1238
2010 Chevrolet Express 2500 4.8L No Start VIN: 1GCZGFBA5A
Good Afternoon. This van has been to two other shops both installing new fuel pump relays. Van has no real pattern to no start condition. today was towed in to us no start no codes. fuel pump was not running. swapped known good relay in and it started multiple...
2012 Chevrolet Cruze LS 1.8L MIL Lamp on VIN: 1G1PC5SHXC
This is a good one - engine set p0017 code 4 seconds into running - the software will not let me change the cam position due to the code in the system. I used an outside voltage source to check to solenoid operation - sure enough the engine stalled - no change... Trouble codes: P0017 (Ckp to exhaust cmp correlation)
1995 GMC K1500 Sierra SL 5.7L No Communication VIN: 2GTEK19K6S
Help!!! i have a 1995 gmc k1500 with abs light on. Cant get any communication from aldl obd-1. Checked pin b, within specs. Checked pin h, should be under 5v it is at 12v. My wiring diagrams arent that good. Cant seem to put my finger on power supply. When i u...
2004 Pontiac Grand Prix GT1 3.8L No Start, Reduced power VIN: 2G2WP52244
Not sure what to think only when it is -0 to -20 the car goes into reduced power and not all the time either. Has anyone run into this??? poss a bad dealer throttle plate out the box? all scann data is reading good and it has not done it here which makes it to... Trouble codes: P0068 (Map/maf tp air flow), P0101 (Mass air flow)

Fixes & Summaries for GM
Fix/Summary Answers
2006 Chevrolet Colorado LT 2.8L Starting VIN: 1GCCS148X6
got her fixed up. installed a new throttle body. that fixed it up. thanks for all the replies.
2002 GMC Yukon XL 1500 SLE 5.3L Misfire, MIL Lamp on VIN: 1GKFK16T52
Thanks to all who all who replied, it was indeed the intake manifold gasket. Replaced and retested and no further problems found at this time. Trouble codes: P0300, P0171, P0174.
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