2003 Chevy Wiring Diagrams

Introduced in 1985 as a rival to the first front-wheel-drive (FWD) Chrysler minivans, the midsize, truck-based Astro was Chevrolet's original entrant into that market. Still available with either rear-wheel drive (RWD) or all-wheel drive (AWD), the Astro is positioned between Chevy's FWD Venture and the full-size, RWD Express.

Is it a four-door pickup truck, or is it a sport utility vehicle that happens to have an open cargo bed? The Avalanche is both, and more. Chevrolet calls it “the ultimate utility vehicle,” but Ford was first with the basic idea by launching its Explorer Sport Trac in 2000. Cadillac joined the fray in January 2002 with the Escalade EXT. Each of these vehicles is considered a crossover model, which means they combine the benefits of flexible passenger and cargo configurations in a truck-based vehicle that's designed for heavy-duty tasks.

Even after launching its new midsize TrailBlazer for 2002, Chevrolet chose to keep the smaller, prior-generation Blazer in its lineup at least into 2003. The TrailBlazer name was previously used on higher-end Blazers. GMC decided to drop the Jimmy — that company's equivalent of the Blazer — when it introduced the midsize 2002 Envoy.

Chevrolet's smallest car gets a fresh exterior look for the 2003 model year. Some of the Cavalier's updated features include a restyled hood, grille and fascia. Its fenders and the greenhouse are essentially unchanged, but the headlights and taillights are new. An antilock braking system is now an option rather than standard equipment. Side-impact airbags, GM's OnStar communication system and XM Satellite Radio are optional for 2003.

Chevrolet introduced the redesigned 2003 version of its muscular sports car early, and a special Anniversary Edition marks the 50th anniversary of the fiberglass-bodied Corvette. The first batch of white Corvettes debuted during the 1953 model year and featured six-cylinder engines and screened headlight covers. Since its debut, the sports car has been through a series of generations; today, the Corvette is an American icon.

For the first time in seven years, Chevrolet's full-size rear-wheel-drive van has undergone a major redesign. The freshening includes upgraded powertrains, revised features and an all-new look. Chevrolet says the vans have three industry firsts: optional all-wheel drive (AWD), an optional left-side door and unique side access panels for commercial vans. The front-end styling has been revised to give a greater family resemblance to GM's other trucks.

An XM Satellite Radio will be available for the 2003 model year in Chevrolet's largest sedan, which also gets standard remote keyless entry and new 16-inch aluminum wheels. Four new body colors will be offered on the Impala this season.

A Malibu replacement is likely for 2004, but for the 2003 model year the front-wheel-drive midsize sedan gets only a couple of new body colors. In addition, the seat bolster material in the LS sedan has been revised.

Except for newly available XM Satellite Radio, four new body colors and fresh five-spoke wheels, little is new for Chevrolet's 2003 Monte Carlo midsize coupe. Remote keyless entry has been added to the LS model, and a Smoker's Package is now available. A high-performance SS model is also available.

Chevrolet's compact pickup truck sees only a handful of changes for the 2003 model year, including a new fuel-injection system for its 4.3-liter V-6 engine. The seats and door panels get new cloth trim. During the 2002 model year, a Flame/Heat decal was added to the Xtreme models and a ZR5 Sport Appearance Package became available for the Crew Cab trucks.

Redesigned for the 2003 model year, Chevrolet's full-size pickups display more of a family resemblance to the Avalanche and TrailBlazer sport utility vehicles. The Silverado sports new angular wheel openings and an aero-styled hood. Front tow hooks and fog lamps are recessed into the front bumper, and the front fascia is flush mounted to the truck's body. An XM Satellite Radio is now offered as an option.

Billed as “the American Street Machine,” Chevrolet's eagerly awaited SSR (Super Sports Roadster) is part open-air roadster and part compact hot-rod pickup truck. Equipped with a retractable “top stack” hardtop, the limited-production rear-wheel-drive pickup will have a starting price of about $42,000. It will be equipped with a 5.3-liter V-8 engine and an automatic transmission.

Though it's not the largest sport utility vehicle on the U.S. market, the Suburban definitely warrants a king-size designation. The sales of Chevrolet's Suburban have been sizable as well, escalating from 133,123 units during 2000 to 154,782 units in 2001, as reported by Automotive News.

Chevrolet's top-selling full-size Tahoe sport utility vehicle is based on the Silverado pickup truck. The Tahoe is the less-gargantuan kid brother of the king-size Suburban, and GMC produces a near twin called the Yukon. Both models compete against the Ford Expedition and Toyota Sequoia. According to Automotive News, Tahoe sales have risen sharply from less than 150,000 units in 2000 to 202,319 units in 2001.

The Chevrolet Tracker is available in two-door convertible and four-door wagon forms, and it may be equipped with rear-wheel drive (RWD) or four-wheel drive (4WD). This compact sport utility vehicle is Chevrolet's version of the Suzuki Vitara. Especially in its wagon body style, the Tracker competes with the Ford Escape, Honda CR-V and Toyota RAV4.

Size matters when it comes to sport utility vehicles. Lately, midsize SUVs are the ones that have been capturing the heart of the market. General Motors launched three new midsize models by the spring of 2001 as early 2002 models. Chevrolet's TrailBlazer is one member of the trio, which was especially crucial to GM because of the debut of the redesigned Ford Explorer. Oldsmobile offers the luxury-oriented Bravada, and GMC has the Envoy, and both compare to the TrailBlazer in structure and appearance. Despite the emergence of this all-new TrailBlazer, Chevrolet is keeping the smaller, prior-generation Blazer in its lineup at least into 2003.

Size matters when it comes to sport utility vehicles. Lately, midsize SUVs are the ones that have been capturing the heart of the market. General Motors launched three new midsize models by the spring of 2001 as early 2002 models. Chevrolet's TrailBlazer is one member of the trio, which was especially crucial to GM because of the debut of the redesigned Ford Explorer. Oldsmobile offers the luxury-oriented Bravada, and GMC has the Envoy, and both compare to the TrailBlazer in structure and appearance. Despite the emergence of this all-new TrailBlazer, Chevrolet is keeping the smaller, prior-generation Blazer in its lineup at least into 2003.

Closely related to the Oldsmobile Silhouette and Pontiac Montana, the Venture is Chevrolet's front-wheel-drive (FWD) minivan. Last year, the Venture added an all-wheel-drive (AWD) option, and little has changed for the 2003 model year.