Jimmy); the smaller Blazer/Jimmy vehicles were sold from 1995 to 2005, while the first-generation Tahoe/Yukon were replaced in 2000. Variants and special models M1009 Around 1976, a prototype K5 Blazer was used as a testbed for a military CUCV vehicle built by Vic Hickey, father of the HUMVEE. Between 1983 and 1987, what is known as the M1009 CUCV was the production militarized version of the civilian K5. The differences are the lack of an air conditioner, an additional leaf spring in the suspension, a hybrid 12/24 V electrical system (described in detail below), blackout headlights, front mounted brush guard, a rifle rack, and special paint jobs. A majority of them are painted olive drab green or in the woodland camouflage pattern, though some vehicles that saw desert use were painted tan. All M1009s, including its derivatives, are powered with the 6.2 L Diesel power plant. The M1009s have a split 24/12 V electrical system. Most of the truck actually runs on 12 V. It has two separate 12 V alternators and batteries wired in series, only the glow plug system, injection pump, the starter, and the jumper cable jack are wired to the 24 V terminals. everything else in the truck runs on 12 V. The glow plugs are actually 12 V glow plugs with a resistor pack on the firewall to drop the 24 V down to 12 V. This resistor pack can be bypassed and the glow plugs run directly off of the 12 V battery. If this is done and the 24 V starter is replaced with a standard 12v starter, the second alternator is no longer needed. (If this is done then the military 24 V slave adapter in the grille will need to be disconnected as well.) Some decommissioned M1009s end up in law enforcement use (e.g. with the Los Angeles County Sheriff's Department) or sold through government auctions, but a handful are still in use by the National Guard. 1976–77 Chalet / Casa Grande In 1976, GM collaborated with recreational vehicle manufacturer Chinook Mobilodge to offer modified versions of the Blazer and Jimmy with a permanently-fixed popup truck camper unit. Approximately 1,800 Blazer Chalet and Jimmy Casa Grande vehicles were built over two years of production. With the top raised, interior headroom increased from . The integrated camper allows occupants to walk through from the cab to the rear living quarters. In 1977,