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Engine:

Air Intake
- Filters
  - Inexpensive Alternatives
- "Vacuator" or "Flap" Valve
Block
- Block Heaters
- Replacing Block Heaters
CDR Valve
- Testing
"Check Engine" Light
- After Being Low on Fuel
Cleaning
- Cleaning the Engine
Codes - See Parts/Tools/Service under "Codes"
Cooling System
- Bleeding the Cooling System
- Coolant Temp Level - Turbodiesels
- Cooling Fan
- Cooling System Care - From the U.S. Army. Requires Adobe Reader (Acrobat)
- Flushing
- How to Increase the Cooling Capacity of the 6.5L Diesel Hummer (pdf)
  - Forum Discussion
- Low Coolant Light Comes On Intermittently
- Radiators
- Removing the Radiator in a 6.5L Turbodiesel
- Temperature Differences
- Testing for Air Leaks
- Testing the Temperature Sensor
- Thermal Cycling and Coolant Leaks
- Turbodiesels Run Hotter
- Water Pump Replacement on 6.2L Diesel
Cylinder Heads
- Cracking
- Head Gasket Replacement
Diagnostics
- Scan Tool
Diesel Engines
- 6.2L Diesel Engine Rebuild
- Diagnostic Parameters - 5.7L, 6.2L and 6.5L - Requires Adobe Reader (Acrobat)
- The Diesel Page - Recommended reading for 6.2L and 6.5L Diesel engine information.
- Glowplugs
  - Cold-Starting Modifications
  - Controller
  - Fusible Links - Description
  - Fusible Links - Testing
  - GM Glowplug Components
  - How to Access Passenger-Side Glow Plugs
  - Ignition Timing
  - Leaking Glow Plug
  - Removing Swollen Glow Plugs
  - Replacement
  - Rusted Plug Removal
  - Starting Modifications - "Wait to Start" Relay Mods and Glowplug Delay. By Allan Madar and Jeff Staud
  - Testing the Glow Plugs
  - Troubleshooting the Glow Plug System
  - Types of Glow Plugs
- Ignition Timing
- "Wait" Light
Duramax Engines
- Conversion "Kit"
Emergency Fuel Shutoff Procedure - If the engine doesn't stop running when turned off
"Engine Braking"
Engine Rebuilding or Replacement
- Swapping for a Duramax, Cummins, Big Block Gas or Any Other Engine
- Tips for Rebuilding
- To a Cummins 5.9L
Exhaust
- Borla Exhaust
- Heat Shield Rattles
- Modifications
Fan
- Checking Fan Clutch
- Fan Clutch Replacement - by Allan Madar
- Fan Removal Without Removing Radiator Stack
- HMMWV Engine Fan diagnostics (may or may not apply to civilian models)
- How the Fan Clutch Works
Fast Idle
Gas Engine(s)
- Gas Engine vs. Diesel Engine
- Increasing Horsepower
- Performance Chips
- Spark Plug Wires
- Testing the Fresh Air Cannister
- Tune-Up
General Engine Products Inc. Engine Support Documents - From AM General, click on "Enter as Guest" below the log-in form
Glow Plugs - Under "Diesel Engine" above
Head Gasket
- Checking for a Blown Head Gasket
Ignition
- Key Stuck in Ignition
Main Bearing Seal
- 6.2L Main Bearing Seal Replacement - A Microsoft Word document
- 6.2L Main Bearing Seal Replacement - A PDF document
Maintenance - See Parts/Service/Maintenance
Neutral Safety Switch
- Replacing the Neutral Safety Switch
Number 8 Cylinder Problem (Turbodiesel)
- Diagnosing the No. 8 Cylinder Problem
- Quick Check
OBD Codes - See Parts/Tools/Service under "Codes"
Oil/Lubrication
- Analysis
- Dual Oil Filters
- General Information About Oil
- Ninety-Degree (90°) Oil Filter Adapter
  - Kit from SSDiesel Supply
  - Individual Parts Needed for DIY
- Oil Leaks - Tracking Them Down
- Oil Types for Diesel, Gas
- PreLub Plus Install
- Synthetic Lubricants
  - Do you Need Synthetic Motor Oil?
Oil Pan
- Dropping/Removing the Oil Pan
Optical Sensor - Replacing
Serpentine Belt
- Sizes of Serpentine Belts
Starting Fluid - Don't Use It on a Diesel!
Starting Problems
- Crank Sensor
- Diagnosing Starting Problems Related to Fuel Systems - .pdf document
- Hard Starting, White Smoke
- Starter Spins, but Doesn't Engage
- Starting When Hot - Diesel
Throttle Position Sensor (TPS)
- Adjusting
Trouble Codes - See Parts/Tools/Service under "Codes"
Turbocharger
- Installing an Intercooler
- Make Your Own Mechanical Wastegate Controller
- Turbo Boost & Pyro Gauge Installation

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