This E.C.M. fits the following GM vehicles: 1999-2000 4.3/5.7/7.4L Chevrolet & GMC Silverado/Sierra C/K pickup (1500,2500,3500), S-10, S-15, Sonoma, Blazer, Jimmy, Astro, Safari, Escalade, Bravada.

This listing is for one service number 16263494 ECM (Engine control module) that is programmed for your vehicle
using the la software updates using your V.I.N. (Vehicle identification number) to exactly
match your vehicle. After you purchase the E.C.M. you will need to provide us with your V.I.N so that
we can program the E.C.M.

E.C.M.

Two things may have to be done after you install your E.C.M. First an anti-theft relearn
may have to be
performed. If this is the case the truck will not start .

The second thing is that a crankshaft variation relearn may need to be performed once the vehicle is
running. This will be evident if the check engine or service engine soon light comes on once the vehicle
is running. You will need access to a scan tool capable of doing this procedure that can do this and clear any related trouble codes (Code
P1336). If this is not available to you a repair shop will have to perform this and clear the
related trouble code. The vehicle will run normal but the ”service engine soon” light will come on and a
trouble code will be stored until this is resolved.

Instructions for both procedures will be included.

.

Same day ping if ordered by 2:00 P.M. EST (Mon. - Fri.)

***Compatible with any of the listed interchange part numbers***