April 5, 2026: LEMON Manuals is launched! Read the announcement.

Data Communication Schematics

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Low Speed Bus - 1 of 3

GM2224337

Courtesy of GENERAL MOTORS CORP.

Fig 2: Low Speed Bus - 2 of 3

GM2224338

Courtesy of GENERAL MOTORS CORP.

Fig 3: Low Speed Bus - 3 of 3

GM2224340

Courtesy of GENERAL MOTORS CORP.

Fig 4: High Speed Bus - 1 of 6 (except MEX/HP2)

GM2224342

Courtesy of GENERAL MOTORS CORP.

Fig 5: High Speed Bus - 2 of 6 (except MEX/HP2)

GM2224343

Courtesy of GENERAL MOTORS CORP.

Fig 6: High Speed Bus - 3 of 6 (Diesel)

GM2224344

Courtesy of GENERAL MOTORS CORP.

Fig 7: High Speed Bus - 4 of 6 (MEX)

GM2224347

Courtesy of GENERAL MOTORS CORP.

Fig 8: High Speed Bus - 5 of 6 (HP2)

GM2224349

Courtesy of GENERAL MOTORS CORP.

Fig 9: High Speed Bus - 6 of 6 (HP2)

GM2224351

Courtesy of GENERAL MOTORS CORP.

Fig 10: Serial Data Communication Enable

GM2224353

Courtesy of GENERAL MOTORS CORP.

Fig 11: Accessory Wakeup Serial Data and Local Interconnect Network Bus

GM2224354

Courtesy of GENERAL MOTORS CORP.

Fig 12: Powertrain Expansion Bus (HP2)

GM2224356

Courtesy of GENERAL MOTORS CORP.

Fig 13: Serial Data Gateway (SDG) Module (HP2)

GM2224357

Courtesy of GENERAL MOTORS CORP.