wumiguel26
Newbie
Does 5.7 tbi out of 1987 g20 work in a 1989 gmc sierra obs
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Engine is stamped 5.7 lgShould. 87 TBI engines were extremely similar if not identical to '88--89 TBI.
I won't make any promises on the engine mounts, exhaust manifolds, oil filter adapter, or the front accessory drive. May/May not be the same.
Well lets see how it goes. Good news is also the 87 tbi i bought comes with everything accessories as well as harnessThe engine it self will fit but, like was previously stated every thing that bolts to the engine is questionable. Save the accessories from the '89 and bolt them to the donor engine.
^^^This. Just looking at the pictures it's obvious your vacuum lines, modules, and A.I.R. pump system are arranged differently.The engine it self will fit but, like was previously stated every thing that bolts to the engine is questionable. Save the accessories from the '89 and bolt them to the donor engine.
Guessing because of limited space on van but confirmed its same engine in other 5.7 tbi trucks^^^This. Just looking at the pictures it's obvious your vacuum lines, modules, and A.I.R. pump system are arranged differently.
Yes, I'm sure it is in both cases.Guessing because of limited space on van but confirmed its same engine in other 5.7 tbi trucks