Will a OBD2 chevy engine work in a OBD1 turck?


Asked by CountryKeough May 03, 2020 at 10:43 PM about the GMC C/K 1500 Series

Question type: Car Customization

What things need to be done to make a OBD2 chevy engine work with a OBD1 chevy truck?

5 Answers


I suppose it would depend on which engine you want to adapt. Early OBD2 engine can probably be switched over without a lot of problems. Swapping out the intake and distributor might do it. Later engines would require a complete wiring, ECU and smog system swap.

1 people found this helpful.

I can't tell what year it is but I found it on JEGS. the truck is 1995 gmc sierra k1500 4x4. the original motor was a EFI 5.0 V8 but when that blew I put a 350 in it and just used the same efi that came with the truck. The oil pressure is low, and I've got a knock now. I was gonna swap another 350 with more hp but all the ones I have found are OBD2, and the ones that I did find that are for OBD1 lack the hp I'm looking for.




Used engines are a crap shoot. Early OBD2 engines were simply OBD1 engines with some changes. Stick to engines that have distributors and EFI that you can swap out or buy a crate engine.

1 people found this helpful.

Okay awesome sauce, thanks for the help!!

1 people found this helpful.

Your Answer:

C/K 1500 Series

Looking for a Used C/K 1500 Series in your area?

CarGurus has 1 nationwide C/K 1500 Series listings and the tools to find you a great deal.

Postal Code:

GMC C/K 1500 Series Experts

  • #1
  • #2
    G A Arne
  • #3
View All

Find great deals from top-rated dealers


Related Models For Sale

Used GMC Sierra 1500
59 Great Deals out of 3,488 listings starting at $4,595
Used Chevrolet Silverado 1500
65 Great Deals out of 4,198 listings starting at $4,995
Used Ford F-150
116 Great Deals out of 7,183 listings starting at $995
Used GMC Sierra 1500HD
2 listings starting at $10,500
Used GMC Sierra 2500HD
9 Great Deals out of 759 listings starting at $9,850
Used GMC Sierra Classic 1500
7 listings starting at $11,500
Used GMC Jimmy
3 listings
Used Chevrolet Tahoe
7 Great Deals out of 317 listings starting at $2,500
Used Chevrolet Silverado 2500HD
16 Great Deals out of 1,136 listings starting at $5,495

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.