What type automatic transmission fluid for 1988 GMC K1500 with 5.7 liter motor

Asked by Dwain Jul 22, 2015 at 01:47 PM about the 1988 GMC Sierra C/K 1500

Question type: Maintenance & Repair

Was told mercon  3 when I asked at napa
was told mercon 6

1 Answer
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Andrew answered 8 years ago

Mercron is for ford, dextron is for chevys. Dextron 3 is what it calls for. But any dextron above that will work (dex3-4-5-or 6)

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