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.
2003 Hummer H2FACTORY OEM SERVICE PROCEDURE
Section 374 (Cruise Control System)
WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Cruise Control
- Diagnostic System Check - Cruise Control
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions (Cruise Control)
- Scan Tool Data Definitions (Disengage History)
- Diagnostic Trouble Code (DTC) List
- DTC P0574: Vehicle Speed Too High - Cruise Control Disabled
- DTC P1554: Cruise Control Feedback Circuit
- DTC P1560: Transaxle Not in Drive - Cruise Control Disabled
- DTC P1564: Vehicle Acceleration Too High - Cruise Control Disabled
- DTC P1566: Engine RPM Too High - Cruise Control Disabled
- DTC P1567: Active Banking Control Active - Cruise Control Disabled
- DTC P1570: Traction Control Active - Cruise Control Disabled
- DTC P1574: Stoplamp Switch Circuit
- DTC P1575: Extended Travel Brake Switch Circuit
- DTC P1585: Cruise Control Inhibit Output Circuit
- Symptoms - Cruise Control
- Cruise Control Indicator Always On
- Cruise Control Indicator Inoperative
- Cruise Control Inoperative/Malfunctioning
- Repair Instructions
- Description and Operation
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.