You're not going to be hauling much of anything if your GM fuel injectors aren't up to snuff. On the job site or at the mall, your GMC truck counts on clean fuel introduced to the cylinders in a specific spray pattern by the GM fuel injectors. If the pintle, or valve, inside the GM fuel injectors gets worn, that pattern is thrown off. Lost power, lost economy, and even a no-start condition can all result from bad GM truck fuel injectors. GM fuel injectors, like the GM Sierra fuel injector, are really just a solenoid valve. Due to the tiny tolerances, though, bits of dirt and gum can really throw off the operation of the GM fuel injectors. The same goes for diesel GM fuel injectors. While they work with different fuel and under higher pressures, diesel GM fuel injectors are subject to the same wear and tear as gasoline GM fuel injectors. And with all GM fuel injectors, when they go, that's it: It's replacement time. You can visit your GM dealer to get new GM fuel injectors, or you can click to order your new GM fuel injectors from us. The only difference is the additional 400% you'll pay to the dealership. Otherwise, we sell the same OE-spec GM fuel injectors they have, just at discount prices you can live with. So order your GM fuel injectors today and remember what it was like to enjoy the drive.