What is causing my GMC to advance the timing about 25° when I plug the wire under the dash together?

5

Asked by Apr 28, 2015 at 07:25 AM about the 1995 GMC Sierra 1500 C1500 SL Extended Cab SB

Question type: Maintenance & Repair

I disconnected the tan/black wire before setting the timing. I set the timing to 0°. Shut it
down, connect the wire back, and when I check the timing, it advances about 20°. If I
disconnect the wire again, it goes back to 0°. Thanks for any help in advance!

1 Answer

10

when you set the timing to zero you are setting it at a starting point for the computer. Connecting the wire now allows the computer to manage the timing for optimum performance at all times

1 of 1 people found this helpful.

Your Answer

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,450
  • #2
    John Saffrahn
    Reputation
    3,760
  • #3
    Glenn Clingenpeel
    Reputation
    3,450
View All

Related Models For Sale

Used Ford F-150
2,848 Great Deals out of 212,983 listings starting at $1,295
Used Dodge Ram 1500
421 Great Deals out of 10,850 listings starting at $1,499
Used Toyota Tacoma
677 Great Deals out of 46,259 listings starting at $2,700
Used GMC Yukon
612 Great Deals out of 22,463 listings starting at $2,500
Used Chevrolet Tahoe
791 Great Deals out of 42,144 listings starting at $1,980
Used Chevrolet Camaro
466 Great Deals out of 31,525 listings starting at $3,550

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
23,082 listings starting at $22,858
2017 GMC Sierra 1500 For Sale
115 Great Deals out of 15,593 listings starting at $22,236
2016 GMC Sierra 1500 For Sale
151 Great Deals out of 4,085 listings starting at $16,988
2015 GMC Sierra 1500 For Sale
176 Great Deals out of 5,446 listings starting at $14,990
2014 GMC Sierra 1500 For Sale
218 Great Deals out of 5,072 listings starting at $10,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.