12639835 12639957 Delco E38 original ECU file – Chevrolet Silverado 5.3 315hp

SW 12639835 is also listed for

The catalogue has this SW number on 2 other vehicle variants, 5 files:

• Chevrolet Camaro 6.2 426hp 4 files
• Cadillac Escalade 6.2 403hp

SW numbers next to 12639835

The closest SW numbers in the archive, by spelling. They are other files, not equivalents. Worth a look when a digit may have been misread.

Other numbers for the Chevrolet Silverado 5.3 315hp

9 files cover exactly this car and engine, on Delco E38 (7), Delco, type not listed (2). If your ECU reads differently from this page, 3 of the others:

This ECU and car in figures

Delco E38: 125 files, 46 SW numbers, 2 with a map pack. Makes: Chevrolet (89), Cadillac (11), Holden (10), Hummer (10). Most listed: Chevrolet Camaro (61), Chevrolet Silverado (13), Cadillac Escalade (11), Holden Commodore (9).

Chevrolet Silverado: 50 files. ECU types: Bosch EDC17CP18 DELCO E86A (14), Delco E38 (13), Bosch EDC17CP18 DELCO E86B (6), Delco E86 (6). Engine codes: GM Duramax LML (8), GM Duramax (4), LGH (1).