How long should you let a Duramax warm up?
2-3 minutes is plenty unless it’s extremely cold and you didn’t plug in the block heater. You need just enough to get oil circulated and let the pistons warm up a little, no more than 10 minutes on a very cold day (-10 and colder).
What is the break in period for a Duramax diesel?
between 500 and 1,000 miles
It takes a while to break in your diesel engine. More specifically, you have to drive between 500 and 1,000 miles before your engine is fully broken in. Many manufacturers recommend only driving in stop-and-go traffic, avoiding sustained speeds, and not towing anything during the break in period.
What mpg does a 6.6 Duramax get?
This Duramax 6.6-liter V-8 gets 17 to 19 mpg on the highway. It has not yet been officially tested for in-town miles per gallon. This Sierra comes with a six-speed automatic transmission.
What is considered high transmission temp?
#1 Cause of Failure The optimal temperature range for transmission fluid is 175 to 220 degrees. Above that, for every 20 degrees bad things happen, starting with formation of varnish at 240 degrees, followed by seals hardening, plates slipping, seals and clutches burn out, carbon is formed, and, ultimately, failure.
What is the best way to break in a new diesel engine?
Here’s how to break in the engine in your new diesel pickup.
- Start By Running Your Engine Lightly for a Few Hours.
- Avoid Idling Your Diesel Truck.
- Continue to Gently Ramp Up Your Engine Use.
- Don’t Tow for at Least 500 Miles.
- Begin Driving Hard After 15 Hours (or 1,000 Miles)
What happens when a Duramax engine goes down?
Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.
Is there a problem with the glow plug on my Duramax?
Often, you can verify the problem by wiggling the wires around the injector. If the problem goes away (even momentarily), you’ve identified the affected zone. Glow plug failure was a concern on the 2006 model year LBZ and LLY Duramax models, but the problem should have been long corrected for owners of these years.
Are there any problems with the LLY Duramax?
In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.
What causes a Duramax to overheat in the summer?
Overheating typically occurs while towing in the Summer months, and is most prevalent in 2005 or earlier models (2006+ models received a larger radiator and fan). Overheating often occurs as a result of a fan clutch failure, preventing the engine fan from providing supplemental airflow as necessary to keep the engine from overheating.