Question about 1999 GMC Suburban

1 Answer

99 Gmc Suburban

I have a 99 suburban with the 5.7 engine and 4x4. It started to stall when I driving down the hwy, the rpm's would drop and came back. I limped back home, The next day went out and it started right up and drove about two miles and started acting up again. I thought it was fuel related so I changed the fuel pump. Didn't cure the problem. Took to local tech and his OBD II reader indicated the Crankshaft Position Sensor. He replaced it and said it was fixed, I drove about 5 miles and it started again. I purchanced my own OBD II and it came back with P0338 which say it an Crankshaft position sensor circuit intermittent. I returned to the tech and he removed the sensor it has been in contact with the relucter ring. He now suggests buying a new sensor from the dealer and trying that. Any ideas would be greatly appreciated.

Rod

Posted by on

  • Anonymous Aug 21, 2008

    I have the same issue, replaced fuel pump twice, still will stall on the highway. I can turn the car off, neutral, then back on and it will run fine for a while.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 2 Answers

On the 1999 - 2000 5.7 vortec engines the distributor gears wear causing the timing to change 2 or more degrees. The ecm is designed to shut down at 2 or more degreedifference. This is in a GM bulletin that recommends replacement at 160k miles. Mine went out at 150k miles. Very similar driving symtoms until it quit running. Both cam sensor codes were set on mine though, not the crank sensor.

Posted on Aug 24, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1993 gmc suburban rough idle, stall in reverse


Idle air control (IAC) control rpm idle during idle.

Test it on idle with ALL electrical on full force.
RPM should increase.
If RPM remain the same then IAC is question.

Jan 13, 2014 | 1993 GMC Suburban

1 Answer

I am changing the rotor on the a 99 4x4 gmc suburban and they are still loose( didnt snug up) , is this a problem ? and how do I correct it?


i think after you put the caliper back on and the tires back on it will be fine, but wait for more responses cause i could be wrong

Nov 07, 2010 | 1999 GMC Suburban

1 Answer

87 gmc sub runs for a while then dies


I had a 99 Suburban that did almost the same thing, it turned out to be the Catyletic Converters were plugged. Try taking the exhaust pipe loose at the manifold for test purposes. If it runs good with the pipes loose, that's the problem. Replace the Cat's. There were no codes for either, it would start and run nice for about 5 seconds, then run rough and then stall.

Jan 23, 2010 | 1987 Chevrolet Suburban

1 Answer

99 GMC Suburban -- While driving engine cut


Does it tick then a bit later tick again? If so that's most likely an automatic circuit breaker that you hear. If you have a short in the wiring the circuit breaker kicks out (tick) and shuts that circuit down, after a minute or so the circuit breaker cools enough to reset itself (tick again). That would explain the truck shuting down. The circuit breaker will continue to reset itself until the battery goes dead, I would suggest disconnecting the battery until you can get it to a shop. You have a short in the wiring somewhere. Good Luck!

Jan 02, 2010 | 1999 GMC Suburban

1 Answer

97 chevy suburban 4x4 1500 only when it drops 40 6.5 tubro diesel


fuel might be thickening -try an anti-gel or other fuel additive-also get fuel pump pressure checked

Oct 14, 2009 | Chevrolet Suburban 1500 Cars & Trucks

2 Answers

99 suburban missing only at idle


Hello;
Have you checked the fuel pressure? You may have a sticking fuel regulator, causing too much fuel at idle. Since it works fine off idle and cruise I would look there.
Thanks;
Rich
RPM Northwest

Jun 10, 2009 | 1999 GMC Suburban

1 Answer

1992 350 suburban 4x4 stalls


check to make sure there is no vacuum going to the egr valve at idle if there is plug the line.

Apr 25, 2009 | 1995 GMC Suburban

1 Answer

1999 suburban gmc - where's the starter?


on bottom back of engine on the passenger side of engine

Feb 19, 2009 | 1993 GMC Suburban

Not finding what you are looking for?
1999 GMC Suburban Logo

1,026 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

60541 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21927 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...