2010 GMC Sierra 3500 HD Thermostats

Genuine GM thermostats for the 2010 GMC Sierra 3500 HD, at wholesale prices. The opening temperature is matched to the engine calibration, so an off-spec thermostat sets codes without failing outright. One-ton heavy duty truck in single and dual rear wheel and chassis cab form.

When to replace

Slow warm-up, a low temperature gauge, or poor heater output. On a heavy 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

• We catch the wrong part before you do. VIN verification is free on every thermostats order.
• Fast out the door. In stock thermostats ship within hours, not days, from Dallas.
• No hassle returns. If the thermostats is not right, send it back.
• Warranty intact. OEM thermostats keep coverage that an aftermarket part can void.
• Wholesale pricing. Most thermostats numbers land well below dealer list.

Avoiding the wrong part

Materials and coatings are specified, not approximated, which is why factory parts last through more heat cycles. Check the VIN before ordering anything that has to bolt to something else. Shipping is calculated on real weight and distance, which usually beats a padded flat rate.