Removal Procedure Caution: To avoid personal injury when exposed to welding flashes or to galvanized (Zinc Oxide) metal toxic fumes while grinding/cutting on any type of metal or sheet molded compound, you must work in a properly ventilated area, wearing an approved respirator, eye protection, earplugs, welding gloves, and protective clothing. 1. Disable the SIR system. Refer to SIR Disabling and Enabling Zones on page 2-81. 2. Disconnect the negative battery (more…)

Removal Procedure Caution: To avoid personal injury when exposed to welding flashes or to galvanized (Zinc Oxide) metal toxic fumes while grinding/cutting on any type of metal or sheet molded compound, you must work in a properly ventilated area, wearing an approved respirator, eye protection, earplugs, welding gloves, and protective clothing. 1. Disable the SIR system. Refer to SIR Disabling and Enabling Zones on page 2-81. 2. Disconnect the negative battery (more…)

This section includes general instructions for checking frame alignment and brief recommendations on frame repair. All crossmembers are riveted to side member and joints are reinforced by gusset plates. Illustrations used in this section are typical of all models and do not show frame reinforcements which may be found on some vehicles. Axles and spring suspensions illustrated are not typical of all models covered in this manual, but frame alignment checking is carried on in same manner (more…)

MECHANICAL f f StabiliTrak Vehicle stability enhancement system S S Tow / Haul mode selector S S Cold climate package Engine block heater A A External transmission oil cooler 2500 / 3500 Series A A SEATING f f Front reclining bucket seats Vinyl S — Front bucket seats Custom cloth A S Driver and front-passenger power seat adjuster 6-way — A 8-passenger seating 1500 Series S S 8-passenger (more…)

Rear axle, 3.73 ratio Refer to Engine S S S S S — S and Axle section for compatibility requirements Rear axle, 3.42 ratio Not available on — A A A A S A Regular Cab models. Requires Vortec 5.3L V-8 SFI engine. Rear axle, 4.10 ratio Included and only — A A A A — A available with Z71 High-Stance Off-Road Suspension Package and Vortec 5.3L V-8 (LH8) engine on 4WD Extended and Crew Cab models. Not available on Regular Cab (more…)

Mechanical f f Vortec 6.0L V-8 vvt hybrid (LFA ) With Active Fuel Management S S (AFM), hybrid two-mode Electronically Variable Transmission (EVT) and 300-volt DC battery pack Auxiliary Power Module (APM) To convert 300-volt battery power to S S 12-volt and 42-volt power Hybrid-specific cooling design Includes a separate powertrain S S electronics coolant (more…)

1-1 Seats and Restraint Systems This section tells you how to use your seats and safety belts properly. It also explains the air bag system. 2-1 Features and Controls This section explains how to start and operate your vehicle. 3-1 Comfort Controls and Audio Systems This section tells you how to adjust the ventilation and comfort controls and how to operate your audio system. 4-1 Your Driving (more…)

The 2004 GMC Sonoma was a compact pickup truck and was powered by 4.3 L Vortec 4300, SEFI. GMC Sonoma was known as S-15, while the GMC Syclone was a high performance version of Sonoma which was introduction a while back in 1991. This owner’s manual will shed some light on driving the GMC Sonoma, particularly the 2004 model year, also to operate features and controls (more…)