THIS AUCTION IS FOR BOTH OEM 350 5.7 TBI L05 "K" ECM COMPUTER CHIPS AKWC FOR ECM 1228747 WORKS ON 1987-92 350 CHEVY / GMC TRUCKS AND VANS WITH TBI FUEL INJECTION WITH A TURBO 400 AUTO TRANS THIS AUCTION IS NOT FOR THE COMPUTER JUST THE CHIPS OR PROMS AS THEY ARE CALLED IF YOU NEED THE COMPLETE ECM WITH THE CHIPS PLEASE CHECK OUT MY OTHER AUCTIONS AND EBAY STORE I HAVE ECM COMPUTERS FOR 2.8 3.1 4.3 5.0 5.7 AND 454 LITER ENGINES AND TBI FUEL INJECTORS AND TBI THROTTLEBODY SENSOR SETS. ITS ALWAYS GOOD TO HAVE SOME SPARE PARTS IN YOUR TOOL BOX IN CASE YOU BREAK DOWN. PLEASE VIEW MY OTHER AUCTIONS FOR MORE CHEVROLET SILVERADO S10 BLAZER ASTRO FORD GMC S15 JIMMY AND SIERRA SAFARI DODGE RAM AND RAMCHARGER TRUCK PARTS. THANKS!!!!