Chevrolet 2008 Tahoe User Manual

12008 GMC Yukon & Chevrolet Tahoe Two-mode VehiclesEmergency Response Guide

10DC Voltage ClassificationsThe 2008 GMC Yukon & Chevrolet Tahoe Two-mode Hybrid vehicles use higher voltage than other Hybrids you may have encou

11Color coding is used to identify the different levels – blue for intermediate voltage cables and orange for high voltage cables. The 2008 GMC Yukon

12Key Hybrid ComponentsThis illustration shows the location of the key 2008 GMC Yukon & Chevrolet Tahoe Two-mode Hybrid vehicle components.Hybrid

13Key Hybrid Components (cont.)The 2008 GMC Yukon & Chevrolet Tahoe Two-mode Hybrid Vehicles use a conventional internal combustion engine coupled

14Key Hybrid Components (cont.)The Electronically Variable Transmission (EVT) contains two 60 Kilowatt motors / generators that are utilized to:• Prop

15Key Hybrid Components (cont.)The Drive Motor / Generator Control Module performs the following operations:• Inverts 300 volts DC to AC for vehicle p

16Key Hybrid Components (cont.)A Nickel Metal Hydride (NiMH) 300 volt Hybrid battery is enclosed in a metal case located under the second row, rear se

17Key Hybrid Components (cont.)A hood ajar switch is part of the hood latch and prevents Auto Stop Mode from occurring if the hood of the vehicle is o

18Approaching a Two-mode vehicle in Auto Stop Mode:If you approach a Two-mode Hybrid vehicle operating in Auto Stop Mode, it may appear the vehicle is

19Approaching a Two-mode vehicle in Electric Vehicle (EV) Mode:While operating in Auto Stop Mode, the Two-Mode Hybrid is also capable of propelling th

2he intent of this guide is to provide information to help you respond to emergency situations involving the 2008 GMC Yukon & Chevrolet Tahoe Two-

20The contactors inside the Hybrid battery are designed to open if one or more air bags deploy. This causes an interruption of the 300 volt electrical

211. Turn the ignition key to the OFF position.2. Remove the 12 volt (+) positive battery cable from the battery post. Ensure the terminal cannot cont

22GM has implemented the labels shown here to help First Responders safely disable the vehicle in an emergency situation. First Responder Labels

23If accessible, you can minimize the potential for 300v current flow by removing the manual disconnect lever from the 300 volt Hybrid battery. The hy

24DANGER: Do NOT cut the orange high voltage 300 volt cables. Cutting these cables can result in serious injury or death. No matter what disable metho

25DO NOT CUT HERE. Under vehicle area near passenger side frame rail contains high voltage 300 volt electrical cables.DO NOT CUT HERE. Two-mode Hybri

26Neutralizing a Battery LeakThe Nickel Metal Hydride (NiMH) battery contains Potassium Hydroxide and if a leak is detected, a mixture of Borax™ and w

27© Copyright 2007, General Motors CorporationConclusionWe are serious about making your job as safe as possible. As you have seen, certain difference

3Vehicle IdentificationSpecial badging is used to identify the 2008 GMC Yukon & Chevrolet Tahoe Two-mode Hybrid vehicles. One of these emblems is

4Vehicle Identification (cont.)A Hybrid badge is also located on the right and left C-pillars of the 2008 GMC Yukon & Chevrolet Tahoe Two-mode Hyb

5Vehicle Identification (cont.)A tachometer with Auto Stop indicator and an Economy gauge are unique to the 2008 GMC Yukon & Chevrolet Tahoe Two-m

6Vehicle Identification (cont.)When the hood is opened, indications that a Two-mode Hybrid system is present include a Hybrid badge and a HIGH VOLTAGE

7Vehicle Identification (cont.)Under the second row, rear seat sub-floor is a DANGER HIGH VOLTAGE label attached to the Hybrid battery case, indicatin

8System OperationThe 2008 GMC Yukon & Chevrolet Tahoe Two-mode vehicles are gasoline-electric Hybrid SUVs that use up to 25 percent less fuel over

9System Operation (cont.)During braking and deceleration, energy is recovered and stored in the Two-mode Hybrid battery, this is referred to as Regene