# RPO ZR2

Regular Production Option ZR2 is a special off-road/suspension package offered by General Motors on their mid-size pickup trucks and SUVs.
It debuted in 1994 on the Chevrolet S-10 and the GMC Sonoma pickup trucks. The Sonoma ZR2 was known as ZR2 High-Rider. In 1996 it was expanded to the two-door Chevrolet Blazer and later offered on the Chevrolet Tracker. The ZR2 package was gradually phased out with the S-Series pickup and SUV lines. However, it has made a comeback as an option on the 2017 Chevrolet Colorado.

## Colorado
### Features

* Standard 3.6L DI DOHC V6 with 308 horsepower and 275 lb-ft of torque
* Optional 2.8L Duramax Turbo-Diesel engine with 186 horsepower and 369 lb-ft of torque
* Front and rear wheel flares
* 2" front and rear lift
* 3.5" wider stance
* 31" Goodyear Wrangler Duratrac off-road tires
* Exclusive ZR2 17 x 8-inch aluminum alloy wheels
* Modified rear axle with a 3.42 ratio
* Front and rear electronic locking differentials
* Multimatic™ shocks (DSSV)
* Tubular rocker protection
* Modified front and rear bumpers for better off-road obstacle clearance
* Skid plates
* Aggressive grille and hood combo unique to ZR2
* Off-Road Mode Technology - Seamlessly pick between Desert, Mud or Mountains
* Optional full-size bed-mounted spare tire carrier

## S-Series
### Features

* Ladder-type Frame with modified mounting points
* 100mm wider track (3.9 inches wider than regular S-10)
* Increased ground clearance (Approx 3" over Regular S-Series 4x4)
* Enhanced front (7.25" ring gear) and rear (8.5" ring gear) axles w/ 3.73:1 rear-axle ratio
* Larger wheel and axle bearings
* 31 x 10.50" BFG A/T Tires (Pickup), 31 x 10.50" BFG Longtrails (Blazer)
* 46mm gas pressurized Bilstein Monotube shocks
* Rear track bar (Pickup), Rear anti-sway bar (Blazer)
* Skid plates
* Fender flares

## Tracker
### Features

* Front and rear wheel flares
* P215/75R-15 all-season tires
* Exclusive ZR2 alloy wheels
* Standard power windows and mirrors
* Front skid plate

## History

* 1994 - ZR2 package is introduced with the Regular Cab second-generation S-Series Pickups
* 1995 - ZR2 package expanded to Extended Cab S-Series Pickups
* 1996 - ZR2 package extended to two-door Blazer models. Third door was offered on extended cab models.
* 1998 - Disc brakes are now standard on the front and rear wheels. Interior updated along with front grille and headlights.
* 1999 - GM replaces the aluminum skid plates with composite skid plates. Side mirrors are updated. (much stronger)
** Last model year the ZR2 option was offered on a regular-cab pickup.
* 2001 - ZR2 package extended to Chevrolet Tracker
* 2002 - ZR2 Trackers were upgraded to the LT trim level, offering optional leather upholstery
* 2003 - During the production year, ZR2s begin shipping with General Ameritrac tires instead of BF Goodrich tires.
** GM discontinues S-Series Pickups. This is the last year that the ZR2 is available on a pickup.
** A GMC Jimmy ZR2 surfaces in Canada. The Jimmy ZR2 was unavailable in the USA.
* 2004 - ZR2 available on Blazer and Tracker models. For the first time, the ZR2 is offered in 2WD.
** GM discontinues Tracker including ZR2 model.
* 2005 - This is the last year for the ZR2 Blazer (USA) and Jimmy (Canada)
** GM discontinues all remaining S-Series models. RPO ZR2 is phased out.
* 2017 - GM reintroduces the ZR2 option on the Chevrolet Colorado.
* 2022 - GM introduces the ZR2 option on the Chevrolet Silverado 1500.
* 2023 - GM introduces the ZR2 option on the Chevrolet Silverado 2500HD.