EFI Live Duramax Cummins

EFI Live Duramax Cummins - GDP Tuning

GDP Tuning - AutoCal Tuning

GDP Tuning AutoCal's support your 2001-2016 Duramax - 2007-2016 Cummins. These tuners gives your truck greater horespower and torque while allowing you to increase your fuel mileage, towing, and performance.

GDP Tuning

2001-2010 6.6L Duramax Diesel

EFI Live tuning for the 2001-20016 Duramax is now available to meet your desired horsepower gains. Each AutoCal will come with 5 tunes. When you purchase a GDP Tuning AutoCal you will be ready to unleash the beast that is lock inside your truck.

Power Levels 2001-2005

No Power - 20hp

Tow - 50hp

Street - 120hp

Performance - 175hp

Rampage - 240hp

Power Levels 2006-2010

No Power - 20hp

Tow - 50hp

Street - 120hp

Performance - 175hp

Rampage - 260hp

GDP 2001-2010 Tuning

2011-2016 6.6L Duramax Diesel

EFI Live for the 2011-2016 Duramax is now available to meet your desire horsepower gains. Each AuoCal will come with 5 tunes. when you purchase a GDP Tuning AutoCal you will be ready to unleash the beast inside your truck.

Power Leves 2011-2016
No Power - 20hp
Tow - 50hp
Street - 75hp
Performance - 130hp
Rampage - 230hp

Notes: Rampage tune or level 5 requires a Fass Pump of AirDog Lift Pump in order to see the full 230hp potential.

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GDP Tuning
866-488-6942

Duramax 6.6L Valve Lash Adjustment

Duramax 6.6L Valve Adjustment Duramax Diesel Pickup Truck This is one method used to set the valve lash on your duramax engine Valve adjustment should be performed anytime the heads are removed. It's also good practice to adjust valves during service that require valve cover remove. TDC (Top Dead Center) First start with, locating the timing mark on the front engine cover and the harmonic balance. Rotate the crankshaft in order to bring the number 1 cylinder to TDC (Top Dead Center) of the exhaust stroke. This mark should be aligned with the mark on the engine. To adjust the valves, start by loosening all the jam nuts with a 14mm wrench, you will also need a flat screwdriver to make the adjustments. Adjust the valve using a .012" feeler gauge Use your .012” feeler gauge between the rocker arm and the valve bridge as pictured. The correct setting is had when there is slight resistance when moving the feeler gauge. It should not be so tight th

How to Remove LB7 Duramax Fuel Injectors Step By Step Instructions

LB7 Duramax Diesel 6.6L R&R Remove and Replace Working on any automobile engine can be intimidating, and that is the very reason why mechanics stay in business, However some tasks that seem intimidating are not actually that difficult if you have the right tools and the right knowledge to complete the task at hand, The following instructions are on how to remove LB7 Duramax Fuel Injectors. This task is often considered a difficult process to complete, but these instructions will break down the process and make this task seem simple. Duramax Diesel LB7 Engine 2001-2004 GMC or Chevrolet Pick-up Truck Drain the Coolant find the drain valve on the passenger side of the wheel well and drain the coolant. To capture the debris,use a bucket and a cloth for a filter. Caution: This step is very important to ensure the combustion chamber won't fill with coolant during the last step of removing the fuel injectors if an injector cup pull out during this step.

Duramax Glow Plugs Operation Glow Plug Relay

Cold Weather Starts and Glow Plugs Glow Plug System Description Duramax diesel engine, air alone is compressed in the cylinder. Then, after the air has been compressed, a charge of fuel is sprayed into the cylinder and ignition occurs, due to the heat of compression. Eight glow plugs are used as an aid to starting. The glow plug initial ON time will vary based on the system voltage and temperature. Lower temperatures cause longer ON times all the times. The ECM provides glow plug operation after starting a cold engine. This post-start operation is initiated when the ignition switch is returned to Run, from the Start position. This operation helps clean up excessive white smoke or poor idle quality after starting. Control of the instant start system, glow plugs is determine by an electronic glow plug control unit and 4.7 volt glow plugs, requiring 2 seconds to heat up to 1,000°C (1,832°F) . The temperature and t

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