What is causing my GMC to advance the timing about 25° when I plug the wire under the dash together?
5

Asked by revcase 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

larrygrab answered 9 years ago

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 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Own this car?

Share your experience with others.

1995 GMC Sierra 1500

Write a car review

Review another car

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,840
  • #2
    dragonflyoffshore
    Reputation
    11,750
  • #3
    John Saffrahn
    Reputation
    11,690
View All

Know more, shop wisely

Search

Related Models For Sale

Used Ford F-150
6,461 Great Deals out of 169,177 listings starting at $1,871
Used GMC Yukon
683 Great Deals out of 15,760 listings starting at $2,996
Used Toyota Tacoma
2,176 Great Deals out of 55,929 listings starting at $3,995
Used Dodge RAM 1500
76 Great Deals out of 1,407 listings starting at $650
Used Chevrolet Tahoe
1,332 Great Deals out of 34,727 listings starting at $1,550
Used Chevrolet Corvette
793 Great Deals out of 14,532 listings starting at $4,999

Used Cars for Sale

2025 GMC Sierra 1500 For Sale
34,257 listings starting at $32,565
2024 GMC Sierra 1500 For Sale
211 Great Deals out of 17,690 listings starting at $25,310
2023 GMC Sierra 1500 For Sale
240 Great Deals out of 3,026 listings starting at $24,998
2022 GMC Sierra 1500 For Sale
144 Great Deals out of 1,842 listings starting at $24,607
2021 GMC Sierra 1500 For Sale
290 Great Deals out of 3,450 listings starting at $20,597

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. Content will be removed if CarGurus becomes aware that it violates our policies.