Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSGMC2013SIERRA 3500 DENALI 2WD V8-6.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULELOCATIONSHARNESS LOCATIONSENGINE CONTROL MODULE (ECM) X2
2013 GMC Sierra 3500 Denali 2WD V8-6.0L
Engine Control Module (ECM) X2
2013 GMC Sierra 3500 Denali 2WD V8-6.0LSECTION Engine Control Module (ECM) X2
Harness Routing Views
Engine Harness Routing- Left Front Side (4.8L/5.3L/6.0L/6.2L except LFA/HP2)
1 - Air Intake Duct
2 - X111
3 - Fuse Block- Underhood X2
4 - X109
5 - X110 (NQF/NQG/NQH)
6 - Engine Control Module (ECM) X2
7 - Engine Control Module (ECM) X1
8 - G102
9 - J105
RENDER: 1.0x
NO RELATED
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.