GMC General Truck Exhaust Parts

Frequently Asked Questions About GMC General Truck Exhaust Parts

What years and models of GMC General trucks do these exhaust parts fit?

Our GMC General truck exhaust parts are designed to fit GMC General models from 1977 to 1987. This includes both single and tandem axle configurations. Always verify your specific model year and engine configuration before ordering, as exhaust routing can vary between diesel (Detroit Diesel 6V-92, 8V-71) and gas engine options. Check your VIN plate or contact our support team if you need help identifying your exact model specifications.

Are these exhaust parts made from aluminized or stainless steel, and which should I choose?

We offer both aluminized steel and stainless steel options for GMC General exhaust components. Aluminized steel parts typically last 3-5 years and are more budget-friendly, making them ideal for trucks in moderate climates or shorter-term use. Stainless steel parts offer superior corrosion resistance and can last 10+ years, especially important for trucks operating in salt-heavy regions or harsh weather conditions. For heavy-duty commercial use, we recommend investing in stainless steel for long-term durability.

What tools and experience level are needed to install these exhaust parts?

Installing GMC General exhaust parts typically requires basic hand tools including wrenches, sockets, and exhaust hangers. Most installations take 2-4 hours depending on which components you're replacing. You'll need jack stands or a lift to safely access the undercarriage. While experienced DIYers can handle most installations, exhaust manifolds and complete system replacements may require cutting, welding, or professional alignment. We include detailed instructions with each part, and our tech support can guide you through any challenges.

Do you offer chrome stacks and tips, and will they affect my truck's performance?

Yes, we carry chrome exhaust stacks and tips specifically sized for GMC General trucks in 4-inch and 5-inch diameters. These are available in straight, curved, and miter-cut styles ranging from 36 to 72 inches in length. While chrome stacks and tips are primarily aesthetic upgrades, proper sizing is crucial to maintain correct exhaust flow and backpressure. Oversized tips without corresponding pipe upgrades can actually reduce performance. We recommend matching your stack diameter to your existing exhaust pipe size for optimal results.

How do I know when my GMC General exhaust system needs replacement?

Common signs include excessive rust or holes causing loud exhaust noise, black soot deposits around joints indicating leaks, decreased fuel efficiency, or strong exhaust smell in the cab. For GMC General trucks, pay special attention to the flex pipes and muffler, as these components typically fail first due to constant heat cycling and road debris. During inspection, look for white or rusty residue at connection points, which indicates exhaust leaks that can affect engine performance and potentially allow dangerous fumes into the cab.