1998 GM 4.3L Emission Label - Vacuum Hose Routing, Belt Diagram & Plug Gap

This is a photograph of the factory Vehicle Emission Control Information (VECI) label affixed under the hood of a General Motors truck with a 4.3 liter engine (engine family codes WGMXT04.3185 / WGMXE0095904, label code FRA/81FRA). The label states the vehicle conforms to California regulations applicable to 1998 model-year new TLEV light-duty trucks and to U.S. EPA regulations applicable in California, and is OBD II certified. Emission control systems listed are CATALYST with SFI/EGR/WUTWC/TWC/HO2S. The specified spark plug gap is 0.060 inch. The label notes that engine spark timing and idle speeds are automatically controlled and adjustments should not be attempted. It includes an accessory belt routing diagram (non A/C configuration) and an emission hose routing schematic showing the EVAP canister purge hose, service port, EVAP canister purge solenoid valve, connection to the EVAP canister located at the rear, MAP sensor, PCV, crankcase vent (to fresh air), throttle body, and HVAC connection (when used). Calibration code 432PGDXG and label part number 12560657 (Printed in U.S.A.) are shown. A refrigerant hose marked R134A is visible in the photo. Readers can use this label to confirm spark plug gap, emissions certification, belt routing, and vacuum/emission hose routing for this engine.