Help keep your hardworking full-size truck or van planted and controlled with the Monroe Gas-Magnum Rear Suspension Shock Absorber 34985. Engineered for midsize and full-size trucks and vans, it installs in the rear position as a direct-fit replacement for many vehicles, among them the 1988-1999 Chevrolet C1500, 1988-1999 Chevrolet K1500 and 1995-2000 Chevrolet C35 — see the "Vehicles it fits" section for the full list.
- Bigger bore and reserve tube: a larger bore and a bigger 2-in. reserve tube hold more oil for greater fluid capacity — up to twice that of standard 1-in. bore shocks — so it works more efficiently with less effort.
- Built to last: a heavy-duty nitrocarburized rod (non-dust-shield units only) and a sintered iron piston enhance durability, while a self-lubricating fluid seal reduces friction against the piston rod.
- Nitrogen gas-charge: maintains tire-to-road contact by reducing aeration and shock fade for improved ride and handling.
- All-weather fluid: OE all-weather fluid with special modifiers handles temperature extremes and helps smooth rod reaction, and full-displaced valving on compression cycles delivers controlled ride and handling.
Backed by Monroe's Limited Lifetime Warranty and exclusive Feel the Difference Guarantee.
Interchange: 52041 · 530189 · HD12140856 · 12474903 · TS3431691B · 342466 · 58488 · 344263 · GM103 · 210475 · 32225 · 37044 · 911044 · SH81039 · 76985 · 12140132 · 12140138
This part cross-references / interchanges with the following part numbers:
52041, 530189, HD12140856, 12474903, TS3431691B, 342466, 58488, 344263, GM103, 210475, 32225, 37044, 911044, SH81039, 76985, 12140132, 12140138
Frequently Asked Questions
What is the Monroe Gas-Magnum 34985?
It is a rear suspension shock absorber for midsize and full-size trucks and vans, designed to provide firm control without a harsh ride.
Which vehicles does it fit?
It fits the rear position on many Chevrolet and GMC trucks, among them the 1988-1999 Chevrolet C1500, 1988-1999 Chevrolet K1500 and 1995-2000 Chevrolet C35. See the "Vehicles it fits" section for the full list.
What are signs a shock absorber may need replacing?
Signs include excessive bouncing after bumps, nose-dive under braking, uneven tire wear, or fluid leaking from the shock body. Diagnose the cause before replacing, since other suspension parts can cause similar symptoms.
Should I replace shocks in pairs?
Replacing both shocks on the same axle as a matched pair is recommended for balanced ride and handling. This listing is for one shock.
What makes Gas-Magnum different from a standard shock?
It uses a larger bore and a 2-in. reserve tube with up to twice the fluid capacity of standard 1-in. bore shocks, plus a nitrogen gas-charge that reduces aeration and shock fade.
