Pontiac Bonneville 1996–1999 Service Manual Set

The system sections provide vehicle-level repair procedures, while the powertrain references add engine work and application-specific automatic-transmission servicing.

Coverage note: Bonneville chassis, body, and electrical coverage centers on 1999. The separate VIN N 4T60-E material is for the Achieva/Grand Am/Skylark family and should not be treated as Bonneville-specific or 4T65-E overhaul instructions.

PDF Search, Section Links, and Diagram Detail

Search and navigation: The 38 GM system-section PDFs contain searchable text and embedded bookmarks, mostly labeled with section numbers or exported filenames. The engine reference, automatic-transmission servicing reference, and both trouble-code PDFs have no embedded text search or bookmarks. Small wiring labels require zooming; lettering within schematic images is outside the searchable text.

The ZIP contains 42 printable PDFs totaling 2,279 pages. The VIN N transmission material comprises 375 repair pages and 81 specification/component-locator pages. File totals include all pages within each PDF.

Engine, Chassis, and Electrical Repair Coverage

These are selected contents, rather than a complete table of contents; further topics include rear-window defogger grid repair and cruise-control cable adjustment.

• Engine repair: Step-by-step procedures for engine removal, intake manifolds, supercharger removal, cylinder heads, timing components, and internal inspection of the L36 and L67.

• Transmission servicing: Application identification, fluid and filter service, park-lock and shift-cable adjustments, PNP switch adjustment, and transmission-specific torque tables.

• Brake service: Disc, drum, hydraulic, and parking-brake procedures, plus EBCM/BPMV replacement and Delco Bosch 5 scan-tool-controlled ABS bleeding.

• Suspension and steering: Front and rear suspension repair, Automatic Level Control sensor adjustment, Real Time Damping components, steering-gear service, and Magna Steer recalibration.

• HVAC repair: Manual and automatic systems, refrigerant recovery, V5 compressor component service, leak testing, heater-core replacement, and temperature-control actuator adjustments.

• Body and glass: Door and window mechanisms, windshield replacement, sunroof track/motor synchronization, seats, and Pontiac-specific trim and bumper procedures.

• Electrical and restraints: System schematics, connector end views, scan-tool data, keyless-entry programming, PASS-Key II service, and SIR disabling/enabling and SDM replacement.

Suited to technicians familiar with GM service procedures and equipped for the documented scan-tool functions and component-overhaul work.

L36/L67 Engine Repair and Cooling

The engine reference separates naturally aspirated and supercharged procedures, with application differences for C, F, G, H, and W bodies. H-body applications include Bonneville, Eighty Eight, LeSabre, LSS, and Regency; Park Avenue appears under the C-body identification.

Internal service extends to rocker arms, pushrods, valve lifters, the balance shaft, crankshaft and rear seal housing, oil pump, pistons, connecting rods, main bearings, valves, valve springs, and camshaft measurements. Intake-manifold and cylinder-head tightening-sequence figures accompany torque-angle data.

The crankshaft section addresses bearing-cap seating and warns that a misplaced No. 4 main cap can interfere with the flywheel-to-converter bolts. It also cautions against using cap bolts to pull the caps into their seats.

The separate cooling sections cover draining, filling, flushing, thermostat and radiator replacement, and VIN K/VIN 1 water-pump procedures. Exhaust material adds alignment, catalytic-converter, intermediate-pipe, muffler, and heat-shield replacement.

Automatic-Transmission Service and VIN N Overhaul

The servicing reference distinguishes routine fluid work from overhaul capacities; its 4T60-E/4T65-E overhaul entry lists approximately 10.0 qt (9.5 L).

The separate VIN N repair material goes into valve-body disassembly, oil-pump service, accumulators and servos, clutch and sprag assemblies, differential end-play checks, seals, bearings, and final-drive components. Holding-fixture instructions, functional air checks, fluid-passage illustrations, and component-location drawings support that unit-repair work.

Chassis, Body, and Control-System Details

Hydraulic-brake material includes master-cylinder bench bleeding, brake-pipe and hose work, and vacuum-booster replacement. Suspension and driveline sections cover hubs, bearings, control arms, struts, and CV-joint/boot repair.

Steering procedures include gear replacement, bleeding, rack-bearing preload adjustment, and position-sensor centering. The sensor instructions distinguish several physical designs; incorrect alignment of a reused sensor can require its replacement.

Body and accessory sections extend to door locks and power-window motors, roof/sunroof components, seat mechanisms, lighting, wipers and washers, entertainment equipment, and the instrument panel and gauges. Pontiac-specific trim procedures distinguish SE, SSE, and SSEi hardware where applicable.

HVAC Equipment and Compressor Service

The HVAC files specify R-134a and PAG oil for internal refrigerant-system circulation, with component-specific oil-distribution tables. Tool callouts include J 39500-B ACR4 recovery/recycling/recharging equipment and the J 33013-B clutch-hub remover/installer.

The V5 compressor instructions warn that incorrect installer use can wedge the key and break the clutch hub, while pounding on the hub or shaft can damage the compressor internally.

Schematics, Programming, and Fault References

Representative drawings include “Cell 44: ABS/TCS Switch, UART, PCM, and Traction Control Switch,” “Cell 44: Wheel Speed Sensors and Variable Power Steering Actuator,” “Cooling Fan Schematics,” “Cell 133: PASS-Key II System,” “Cell 43: Strut Actuators,” and “Cell 100: Headlamps w/ UB3.”

Connector end views pair pin positions with wire colors, circuit numbers, and functions, allowing circuit tracing to continue from the schematic to the connector. Other tool references include the J 25034-C steering-pump pulley remover, J 39032 stationary-glass removal tool, and J-36660 torque-angle meter.

Keyless-entry material covers transmitter programming and synchronization; theft-deterrent sections address PASS-Key II key and replacement-component procedures. The two standalone trouble-code PDFs provide definitions rather than model-specific PCM diagnostic trees.

Brake, SIR, and A/C work can involve scan-tool-controlled hydraulics, undeployed inflators, and pressurized refrigerant; follow the applicable service procedures and use the specified diagnostic and recovery equipment.

A Preview of Engine, Brake, and HVAC Specifications

The engine specification table lists a 96.5 mm bore and 86.4 mm stroke for the covered V6. Its inspection tables extend to bearing clearances, valve dimensions, and oil-pump measurements.

Disc-brake data lists a 278.00 mm rotor diameter, 32.00 mm maximum thickness, 30.70 mm discard thickness, and 0.060 mm maximum lateral runout. Front-suspension fastener data includes 190 N·m for the control-arm front nut and 145 N·m for the drive-axle nut.

The automatic HVAC section lists a refrigerant capacity of 0.91 kg (2.0 lb), alongside separate oil-distribution quantities for the compressor, accumulator, condenser, and evaporator.