Memory Seat Module (MSM) X2 (A45)

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Memory Seat Module (MSM) X2 (A45)
WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Memory Seat Module (MSM) X2 (A45)
GM258247Courtesy of GENERAL MOTORS CORP.
Memory Seat Module (MSM) X2 (A45)

Pin Wire Circuit Function
A 3 D-GN 286 Driver Power Seat Front Vertical Motor Up Control
B 3 YE 282 Driver Power Seat Rear Vertical Motor Up Control
C 3 L-BU 283 Driver Power Seat Rear Vertical Motor Down Control
D 3 TN 768 Driver Power Seat Lumbar Motor Up Control (AL2)
E 3 PK 2111 Steering Column Tilt Motor Up Control
F 3 D-BU 611 Driver Power Seat Lumbar Motor Forward Control (AL2)
G 3 L-GN 276 Driver Power Seat Recline Motor Forward Control
H 3 L-BU 277 Driver Power Seat Recline Motor Rearward Control
J 3 TN 285 Driver Power Seat Horizontal Motor Forward Control
K 3 L-GN 284 Driver Power Seat Horizontal Motor Rearward Control
L-M - - Not Used
N 3 PK 610 Driver Power Seat Lumbar Motor Rearward Control (AL2)
P - - Not Used
R 3 OG 2098 Steering Column Telescope Motor Forward
S 3 D-BU 287 Driver Power Seat Front Vertical Motor Down Control
Connector Part Information 
  • Harness: Driver Seat
  • OEM: 12129432
  • Service: 12129432
  • Description: 16-Way F Metri-Pack 280 Series, ACT (GY)
Terminal Part Information 
  • Terminal/Tray: 12186456/5
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.