| Subject: | Pre-Delivery and Service Guide |
| Models: | 2004 Cadillac XLR |
The purpose of this service bulletin is to introduce the 2004 Cadillac XLR and describe the actions your Service Department will need to take to ensure that your dealership is able to fully service this exciting new model.
The Cadillac XLR is GM and Cadillac’s ambitious entry into the elite luxury roadster class. The two-seat roadster is designed to be an icon for the new era of Cadillac, a product renaissance of vehicles that feature bold design, exhilarating performance and contemporary luxury.
The XLR has been developed on the next generation of GM’s performance car architecture, which is specifically designed for open car applications. This world-class vehicle architecture features advanced steel hydroforming, structural backbone “tunnel,” an aluminum cockpit structure and cored composite floors, making it exceptionally stiff and lightweight. The result is a chassis and body that provides great structural integrity – the foundation for the car s outstanding agility, comfortable ride and sound safety performance. The luxury roadster also features several exclusive Cadillac technologies, including a next-generation 4.6L Northstar® V8 engine in its first production rear-wheel-drive configuration. The engine is mated to an electronic five-speed automatic transmission with manual mode in a transaxle configuration.
The XLR’s chassis includes advancements such as GM’s Magnetic Ride Control active suspension damping, the StabiliTrak® yaw control system and Michelin ZP tires with “run-flat” capability. Adaptive Cruise Control – a radar-based technology that makes driving with cruise control more convenient and comfortable – is integrated within a head-up display, an exclusive feature among luxury roadsters.
Powertrain
The XLR features the all-new 4.6L (LH2) Northstar® V8 engine. This powerplant has been completely re-engineered, marking the first time a Northstar® engine has gone into production in a rear-wheel-drive configuration. The engine features major improvements across the board, not just a transition to rear wheel drive. First-time applications to the Northstar® engine include electronic throttle control, variable valve timing, upgraded engine structure and a close-coupled catalytic converter system. The result is significant enhancements in power and smoothness, with peak horsepower of 320, and an extremely flat torque curve for strong power delivery. The engine is mated to the 5L50-E electronic five-speed automatic transmission with Driver Shift Control in a transaxle configuration. This new transmission makes its debut in the XLR, but comes from proven stock. It is an enhanced version of the 5L40-E unit featured in the Cadillac CTS, modified for additional torque capacity and the unique rear axle location.
Cadillac XLR contains a package of technological features meant to add pleasure and convenience – not complexity – to the experience of driving a luxury roadster. High-technology applications on the XLR include:
Adaptive Cruise Control (ACC)
The XLR is among the first vehicles in the North American marketplace with ACC, which greatly increases the convenience of cruise control. The system uses a radar sensor mounted at the front of the XLR to detect objects in its path. If the lane ahead is clear, the system will maintain the set speed. When slower traffic is detected, the system will automatically adjust to a safe distance by using throttle control and limited braking.
Climate Control Seats
A first-time General Motors application, climate control seats provide personalized cooling and heating for the driver and passenger seats. Airflow and temperature are delivered via a thermo-electric unit and fan mounted in each seat. The leather in the seats is perforated for airflow.
Integrated Navigation/Radio/DVD/Web-Enabled
The XLR is equipped with perhaps the most sophisticated – yet easy to use – entertainment and information system in its segment. Via a 7-inch (17.8 cm) color touch screen mounted in the upper center console, occupants have access to DVD navigation; an eight-speaker world-class Bose® audio system with a six-CD in-dash changer and digital signal processing modes; XM satellite radio broadcasting (not available in Canada); and DVD movies and entertainment (in park position only.)
Keyless Access
The XLR is a “keyless” car. Via electronically controlled locking, access and ignition systems, customers need not even take the key fob out of their pocket or purse to operate the car. Upon touching the uniquely designed door switch, a series of antenna authorizes the presence of the key fob to unlock and unlatch the door. Vehicle ignition operates via a push-button control on the instrument panel. Before the engine is permitted to start, the system verifies the fob is inside the vehicle and the brake is depressed. Keyless Access eliminates “key fumbling” and provides a level of security beyond that of conventional vehicles.
Retractable Hard Top
The advanced retractable hardtop system transforms the XLR from coupe to convertible with one-button operation. The system was developed and executed by Car Top Systems GmbH of Germany, which has designed roof architectures for some of the most celebrated convertibles in the industry.
High-Intensity Discharge (HID) Headlamps
The XLR is equipped with HID lighting technology for superior visibility. This highly efficient technology represents the leading edge of lighting systems in production today, providing outstanding visibility.
OnStar®
The XLR is the only vehicle in its class equipped with OnStar®, GM’s revolutionary information and communications service. This includes the latest in voice activation that will operate in English and French and with the top up or down, which up until now was a technology under development. OnStar® automatically calls for help in case of a crash. This advanced crash notification technology is a new innovation, a step beyond the OnStar® s existing system that calls for assistance in the event of an air bag deployment. It also can be used to summon routine or emergency assistance, to get routing assistance, or for a variety of concierge services.
Advanced-technologies incorporated in the chassis system of the XLR include the following:
Magnetic Ride Control
This is a state-of-the-art suspension system that uses magneto-rheological real-time damping to provide exceptional responsiveness and increased wheel contact with the road, regardless of the surface. The reduced wheel bounce ensures an even ride by virtually eliminating undesirable body motions.
Anti-Lock Braking System (ABS)
ABS with dynamic electronic brake proportioning across the rear axle provides for optimum braking and control under the most demanding conditions. With the addition of a brake analog sensor (BAS), this ABS system is one of the most sophisticated in the industry.
GM Local Area Network (LAN)
The LAN provides a high-speed communication bus linking critical onboard electronic control systems for instantaneous interaction of Stabilitrak®, Magnetic Ride Control, ABS, Traction Control and Powertrain Control and ACC.
MagnaSteer
This variable-effort steering system affords drivers unparalleled control on the highway and effortless low-speed maneuverability for parking in an exceptionally smooth power steering system.
Michelin ZP Tires
These tires have an advanced “run flat” technology that eliminates the need for a spare and provides outstanding overall tire performance. This technology consists of self-supporting sidewalls that allow the tires to maintain safe function during and after a loss of pressure for up to 202 km (125 mi) of continuous driving. The ZP technology has been specifically tuned for the XLR and features overall performance superior to many competing run-flat systems.
Tire Pressure-Monitoring System (TPM)
This system transmits air pressure measurements from each tire to the driver information center.
Double Wishbone Suspension
The suspension features all-aluminum components and a tubular stabilizer bar.
Hydraulic Mounts
The mounts are fitted on the front and rear for the powertrain module, minimizing noise transfer and vibration.
The GM LAN system links the critical vehicle control functions in a high-speed bus that transfers data in real-time. With this high-speed link, information is being transferred rapidly via a multiplex line. This greatly reduces the need for dedicated wires for individual functions.
In effect, critical control functions can share information virtually in real time: for example, yaw rate and steering angle information can be shared instantly with the antilock brake system and Stabilitrak®.
The modules on the GM LAN are:
Class 2 System
The lower-speed Class 2 system houses the functions that do not require ultra high-speed computing power and communication. These functions include the following:
Integrated Body Control Module
The Body Control Module is basically the heart of the electrical system, acting as the gateway between the high-speed GM LAN and the Class 2 system. As such, it performs several functions, including:
The BCM also controls many of the basic vehicle functions on Class 2, often interfacing with other modules on the system. These functions include:
A unique feature of the BCM is its incorporation of a fuse center, which usually is a stand-alone unit, to conserve space and reduce part count – a battery cable to the fuse box has been eliminated, for example.
Diagnostics
Service diagnostics are performed on all of the Class 2 systems via one of two splices or 12-pin plug-in ports located for easy access: one under the left side kick panel and one of the right side panel. A technician simply plugs in a test instrument which allows any device in the system to be isolated and analyzed, cutting diagnostic time as much as 40 percent in many cases.
The OnStar® module on the GM LAN is available to download diagnostic and software changes for the high-speed functions. In this mode, OnStar® essentially acts as a gateway, eliminating the need to process diagnostic information from high-speed to low-speed and low-speed to high-speed systems through the BCM since OnStar® is also on Class 2, where it performs its various safety, security and information functions.
Fluids and Lubricants
Many of the fluids and lubricants specified for the XLR differ from those used in other Cadillac products. Please ensure that only correct fluids and lubricants are used. Damage may result from use of incorrect materials. The following chart summarizes some of the most critical. Please refer to Service Information (SI) and the Owner’s Manual for a complete list.
|
Location |
Fluid/Lubricant |
Quantity |
|---|---|---|
|
Fuel |
Recommend premium fuel will operate on regular unleaded fuel |
Tank capacity: 70L (18.5 gal) |
|
Engine Oil with Filter |
Oil meeting GM standard GM4718M. Mobile 1 is used on the original oil fill |
7.6L (8 qt) |
|
Engine Coolant |
DEX-COOL® 50% concentration |
14L (14.8 qt) |
|
Auto Trans Oil |
DEXRON® III |
9L (9.5 qt) |
|
Rear Axle |
SAE 75W-90 API, GL5, synthetic axle lubricant (GM P/N 12378261(in Canada, 10953455)) and limited slip additive (GM P/N 1052358 (in Canada, 992694) |
|
|
Convertible Top Fluid |
GM P/N89022748 (in Canada, 30579887) (Saab convertible top fluid, Saab part number 3032356) |
|
|
Brakes |
Delco Sumpreme 11® Brake Fluid GM P/N12377967 (in Canada, 89021320) or equivalent DOT-3 brake fluid |
|
|
Power Steering |
GM power steering fluid (US P/N 89021184, Canada P/N89021186) |
Diagnostic Tools
Tech 2® diagnostic
CANDi module
Service SupportDelivery Condition
Vehicles are delivered in the following condition:
Transseal Removal
The Transseal film should easily peel away from the surface. The vehicle should be moved to a shaded area and the surface should be cool to the touch. The material should be wet to promote easier removal. Once cool and wet, the material should easily be peeled from the surfaces. Caution should be used in removing material from the rear tonneau cover. The rear tonneau cover is only visible when the top is in the stowed position; hence, the interior of the vehicle is vulnerable to water during removal.
License Plate Installation
Several US states, Canadian provinces and foreign countries require front license plates. When required, the front plate should be attached by using the instructions and hardware furnished. The front fascia has two dimples where the licence plate should be attached.
Set Time Display on Radio
To set the correct time, touch the button with the clock symbol or touch and hold the time display button in the upper right corner of the display. From the clock adjust menu, use the adjust hour and min buttons to set the correct time. Set the display type to 12 H for 12 hour clock. GPS time button will set the clock by the GPS satellite. Use the time zone button to set the correct time zone. Touch the return button to go back to previous page.
Set Navigation System to Proper Area
Press the route hard button. When the route menu appears, press the destination button. Touch the change button under Search Area. The system will display a map with the regions. Identify the current region and press the appropriate button. The states that are included in that region will be identified at the bottom of the display. Push enter to save the change. Push the return button to return to the destination screen.
XM Radio
Customers that order XM Radio and do not want the antenna installed must have the XM module disconnected to remove the XM soft keys from the radio display. The XM Module can be accessed through the trunk behind the close-out curtain. If the XM module is not unplugged and the XM antenna is not connected, it will generate a diagnostic trouble code.
Tire Pressure
Tires may be over-inflated during production. This will prevent flat spotting of tires when left in storage for prolonged periods, but is not suitable for normal driving. Tires should be set to 207 kPa (30 psi) when cold prior to delivery.
Complete the Completely Satisfied Delivery Process and Worksheet. Pay particular attention to the Items listed below:
|
Additional Attention is Required. Make Sure to Check Prior to Delivery. | |
|---|---|
|
Remove transseal paint film protection, including front tonneau. |
|
|
Check contents of “loose items” and install components into vehicle:
|
|
|
Removal all interior protection. |
|
|
Remove front and rear shock stuffers. |
|
|
Install (XMS band) radio antenna, when equipped. |
|
|
Set clock time in radio. |
|
|
Set navigation area. |
|
|
Set tire pressures to specified pressure (refer to tire placard at rear of driver’s door). |
|
|
Check fluid levels: coolant, engine oil, brake fluid, auto trans oil, power steering, windshield washer fluid. Add fluid if required. |
|
|
Install lower air deflectors (2). |
|
|
EN-46326 |
Flywheel Holding Tool |
|
EN-46327 |
Timing Chain Retention Tool |
|
EN-46328 |
Camshaft Holding Tool |
|
J 21867-15 |
Pressure Hose |
|
J 21867-2 |
90 Deg fitting for Trans |
|
J 28467-81 |
Engine Support Adapter |
|
J 33432-A |
Transverse Leaf Spring Compressor |
|
J 35589-A |
Master Cylinder Bleeder Adapter |
|
J 42055-7 |
Transmission Support Adapter |
|
J 42128 |
Axle Shaft Remover |
|
J 42129 |
Rear Hub Spindle Remover |
|
J 42188-A |
Ball Joint Separator |
|
J 42203 |
Driveline Support |
|
J 42743 |
Trim Height Adjustment |
|
J 42854 |
Trim Height Measurement Gauge |
|
J 43631 |
Ball Joint Separator |
|
J 43822 |
Shock Replacer |
|
J 45442 |
Alignment |
|
J 46405 |
Seal Installer |
|
J 46588 |
Axle Seal Clamp |
Article ID: 117
Created: March 16, 2017
Last Updated: March 16, 2017
Author: Rob Loszewski
Online URL: https://xlr-net.com/knowledgebase/article.php?id=117