Keep your hardworking half-ton pickup planted and controlled with the Monroe Gas-Magnum Rear Suspension Shock Absorber 34678. It installs as a direct-fit rear replacement for the 1999-2006 Chevrolet Silverado 1500 and GMC Sierra 1500, plus the 2007 Chevrolet Silverado 1500 Classic and GMC Sierra 1500 Classic.
Part of Monroe's Gas-Magnum truck line, it is designed to deliver firm control without a harsh ride on midsize and full-size trucks and vans.
- Truck-duty valving: full-displaced valving on the compression cycle for controlled ride and handling.
- Larger bore, more fluid: a 1-3/8 in. bore and 2 in. reserve tube hold more oil — up to twice the fluid capacity of standard 1 in. bore shocks — at lower operating pressure.
- Nitrogen gas charge: helps reduce aeration and shock fade to maintain tire-to-road contact.
- Durable internals: a sintered iron piston and self-lubricating fluid seal reduce friction, with OE all-weather fluid for consistent performance across temperatures.
- Metal dust shield included; premium grade, gas-charged, finished in yellow.
Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Sold individually; the listed applications use two per axle, so order 2 and replace both sides together as a matched pair for balanced ride control. Backed by Monroe's Limited Lifetime Warranty and Feel the Difference Guarantee.
Interchange: none listed. Manufacturer part number 34678.
Frequently Asked Questions
Which vehicles does the Monroe 34678 shock fit?
It is a direct-fit rear shock for the 1999-2006 Chevrolet Silverado 1500 and GMC Sierra 1500, plus the 2007 Silverado 1500 Classic and Sierra 1500 Classic. See the Buyer's Guide tab to confirm your vehicle.
How many shocks do I need?
The listed applications use two per axle. This listing is for one shock sold individually, so order 2 and replace both sides together as a matched pair for balanced ride control.
Is this a front or rear shock absorber?
It is a rear suspension shock absorber, as stated in Monroe's Gas-Magnum listing for these trucks and vans.
Is the 34678 gas-charged?
Yes. It uses a nitrogen gas charge that helps reduce aeration and shock fade to maintain tire-to-road contact for controlled ride and handling.
Does it come with mounting hardware?
No. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused.
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