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 MANUALSCHEVROLET2006SUBURBAN K2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 208 (STARTING SYSTEM)DIAGNOSTIC INFORMATION & PROCEDURESDIAGNOSTIC SYSTEM CHECK - ENGINE ELECTRICALTEST PROCEDURE
2006 Chevrolet Suburban K2500, 6.0 U
Test Procedure
2006 Chevrolet Suburban K2500, 6.0 USECTION Test Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Perform the Battery Inspection/Test.
- For 2003, see BATTERY TESTING & INSPECTION in CHARGING SYSTEM in ELECTRICAL.
- Install a scan tool. Does the scan tool power up? If yes, go to next step. If no, go to BODY CONTROL MODULES article in COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.
- Turn ON the ignition, with the engine OFF. Attempt to communicate with the powertrain control module (PCM) on the class 2 serial data circuit. Does the scan tool communicate with any module on the class 2 serial data circuit? If yes, go to next step. If no, go to BODY CONTROL MODULES article in COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.
- Select the Display DTCs function for each module. If using a Tech 2, use the Class 2 DTC Check feature in order to determine which modules have DTCs set. Record all of the displayed DTCs the DTC status and the module which set the DTC. Does the scan tool display any DTCs? If yes, go to next step. If no, go to SYMPTOMS - ENGINE ELECTRICAL .
- Does the scan tool display any DTC beginning with "U"? If yes, go to BODY CONTROL MODULES
article in COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT. If no, go to appropriate article, refer to the following:
- For 2003, see DIAGNOSTIC TROUBLE CODE DEFINITIONS under SELF-DIAGNOSTIC SYSTEM in GENERATORS & REGULATORS article.
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.