GMC General Truck Frame & Chassis

Frequently Asked Questions About GMC General Truck Frame & Chassis

What years and models of GMC General trucks are these frame and chassis parts compatible with?

Our GMC General frame and chassis parts are designed to fit GMC General trucks manufactured from 1977 to 1987. These parts are compatible with various General models including the GMC General conventional cab trucks with both single and tandem axle configurations. Always verify your specific truck's VIN and model designation before ordering, as some variations may exist between early and late production years. If you're unsure about compatibility, our team can help verify fitment with your truck's serial number.

What gauge steel are the frame rails and crossmembers made from, and how do they compare to OEM specifications?

Our replacement frame rails are manufactured from heavy-duty 10-gauge steel, matching or exceeding original GMC specifications. Crossmembers are typically constructed from 7-gauge steel for maximum strength and durability. All frame components feature reinforced stress points and use the same bolt patterns as factory parts. The steel is treated with a rust-preventive coating before painting, ensuring long-term protection against corrosion in harsh conditions.

Do I need special tools or professional installation for frame and chassis repairs?

Frame and chassis work typically requires heavy-duty equipment including a truck lift or jack stands rated for commercial vehicles, cutting torches for removing damaged sections, and welding equipment for proper installation. Most frame rail replacements need precise measurements and alignment to maintain proper truck geometry. While experienced mechanics with the right tools can perform these repairs, we recommend professional installation at a qualified heavy truck repair facility to ensure safety and proper alignment. Installation time varies from 8-20 hours depending on the extent of repairs needed.

Are frame repair sections available, or do I need to replace entire rails?

We offer both complete frame rails and repair sections for GMC General trucks. Common repair sections include rear spring hanger areas, fifth wheel mounting sections, and front suspension mounting points - areas most prone to stress cracks and corrosion. Repair sections can save significant time and money when damage is localized. Each section is pre-drilled to match factory specifications and includes detailed measurements for proper placement. Full frame rail replacement is recommended when multiple areas show damage or when frame integrity is compromised.

What finishes are available, and what preparation is needed before installation?

Frame and chassis components are available in three finishes: bare steel for custom painting, black primer ready for topcoat, and fully painted gloss black. Bare steel parts require immediate preparation to prevent rust, including cleaning, priming, and painting. Primed parts should receive a topcoat within 30 days of installation. All mounting surfaces should be cleaned to bare metal before installation, and we recommend applying frame wax or undercoating after installation for maximum protection. Hardware is typically not included unless specified, as most installations reuse existing grade 8 bolts or require new hardware based on condition.