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'Regular Production Option ZR2 is a special off-road/suspension package offered by General Motors primarily on their 4x4 Chevrolet S-10 S-Series line. It debuted in 1994 on the Chevrolet S-10 and the GMC Sonoma pickup trucks. In 1996 it was expanded to the two-door Chevrolet S-10 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.
- 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), front anti-sway bar (blazer)
- Skid plates
- Front/rear disc brakes (1998-2005), disc/drum brakes (1994-1997)
- 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.
- 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.
2016- GM reintroduces the ZR2 option on the Chevrolet Colorado starting on 2017 models.