Swapping a 86 350 into an 89 suburban

Asked by Jan 11, 2017 at 05:46 AM about the 1989 GMC Suburban R1500

Question type: Maintenance & Repair

I have 1989 gmc suburban with a 350 tbi. I found a
good deal on a engine out of an 1986 suburban.
How hard would this be to swap?

9 Answers

105,335

An 86 and the 89 should both be Vortec engines not TBI so swapping would no big deal, there maybe some connection differences on the sensors but you could just swap those too.

76,245

Ah, no they are not Vortec, the 5.7L (350) came out in 1996. These engines will interchange. You just may have to change the intake, and associated parts.

105,335

Odd my 86 Chevy was a Vortec and my coworkers 89 Chevy truck was also a Vortec, maybe it was where they were manufactured, possibly Canada.

76,245

Well the 4.8L came out in those years.

105,335

Right but those were V6 engines, and they were also Vortec.

76,245

Right, If you look at the intake in how it is bolted down the Vortec has less bolts to hold it down on the 5.7L

105,335

Plus the aluminum heads, and that is why they kept loosing the intake gaskets, did them twice on my Vortec before I sold it.

76,245

Yep, still a problem with the cast iron heads, mine are cast iron.

76,245

With a aluminum intake....

Your Answer

Suburban

Looking for a Used Suburban in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

Shortcuts

GMC Suburban Experts

  • #1
    LouB
    Reputation
    1,420
  • #2
    Larry Thibert
    Reputation
    230
  • #3
    ShadetreeMech
    Reputation
    220
View All

Related Models For Sale

Used Chevrolet Suburban
544 listings starting at $2,871
Used GMC Sierra 1500
245 Great Deals out of 10,502 listings starting at $1,775
Used Ford F-150
646 Great Deals out of 10,068 listings starting at $2,995

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.