ATZTNUO body & cab mount bushing kit for 1999–2004 Chevy Silverado/GMC Sierra 1500 (Black) — polyurethane, full 8-up/8-low set

If your 1999–2004 Chevy Silverado or GMC Sierra shows signs of sagging cab height, excessive vibration, or sloppy handling, worn body and cab mounts are a common cause. This ATZTNUO kit supplies polyurethane upper and lower mounts, reinforced washers, and fitted bolts designed to replace aging rubber mounts and bring back a firmer, more stable connection between the cab and frame. The kit fits 1999–2004 Silverado/Sierra 1500 models (2WD/4WD) and some 2500 non-HD models; verify fitment before purchase.

How will this kit change steering feel and body movement?

Upgrading to rigid polyurethane mounts reduces flex where the cab meets the frame, which limits body roll and unwanted sway. Drivers typically notice crisper steering response and less cabin movement during acceleration, braking, and cornering.

• Polyurethane construction resists compression and deformation compared to aged rubber
• Reduced body flex improves handling precision and vehicle stability
• Less vibration transmitted to the cabin lowers perceived noise and movement

What parts are included and what do I need to install them?

The kit contains complete sets of upper and lower mounts, reinforced washers, and the required bolts for straightforward replacement of worn mounts. Basic hand tools, a jack and stands, and a service manual or online torque specs are recommended for safe installation.

• Upper mounts x8 and lower mounts x8 for full cab support replacement
• Reinforced washers x8 and bolts x8 matched to factory mounting points
• Installation requires lifting the body slightly and following factory torque procedures

Will these mounts fit my truck and are there fitment limitations?

This ATZTNUO kit is manufactured for 1999–2004 Chevy Silverado 1500 and GMC Sierra 1500 (2WD and 4WD) and some 2500 non-HD models. It is not recommended for 1500HD/2500HD models or certain pickup configurations that need longer bolts or different hardware.

• Compatible: 1999–2004 Silverado/Sierra 1500 (2WD/4WD)
• May fit some 1999–2004 2500 non-HD variants—check dimensions
• Not recommended for 1500HD / 2500HD or trucks requiring extended bolts

How durable are these mounts versus the original rubber parts?

Constructed from high-quality polyurethane, these mounts resist tearing, premature cracking, and sagging that commonly affect rubber over time. The material maintains shape under load and in extreme temperatures, extending service life and preserving cab alignment longer than older rubber designs.

• Polyurethane offers improved tear and abrasion resistance
• Maintains structural integrity across a wider temperature range
• Helps prevent recurring sag and reduces the need for frequent replacements

Who is this for: The ATZTNUO 7-141 body and cab mount bushing kit is aimed at Silverado and Sierra owners who want to correct sagging cab height, reduce cabin vibration, and restore factory-like alignment and handling. It’s suitable for DIY mechanics and professional shops servicing 1999–2004 1500 series trucks and some 2500 non-HD models—confirm your truck’s model year and configuration before ordering to ensure proper fit.