2013 Chevrolet Avalanche Thermostats

Genuine GM thermostats for the 2013 Chevrolet Avalanche, at wholesale prices. The opening temperature is matched to the engine calibration, so an off-spec thermostat sets codes without failing outright. GMT800 for 2002-2006 and GMT900 for 2007-2013, with the midgate that folds the bulkhead into the bed.

When to replace

Slow warm-up, a low temperature gauge, or poor heater output. On a light duty pickup, cab configuration, drivetrain and box length all split this group, so the badge on the tailgate is not enough to order from.

Why order factory

• VIN verified fitment. We confirm the thermostats number against your vehicle before it ships.
• Same day dispatch. Order thermostats by mid-afternoon and it leaves our warehouse that day.
• Returns without a fight. We would rather fix a thermostats order than argue about it.
• Covered by GM. On thermostats that coverage is worth more than the price gap.
• Real wholesale. The same thermostats your dealer sells, at a fraction over our cost.

Avoiding the wrong part

The factory number ties back to GM engineering records, which is something no aftermarket catalog can offer. Give us the number stamped on the old part and we will trace what it superseded to. Same day shipping on in stock items, direct from one of the largest GM parts warehouses in the country.