2006 cadillac dts alternator replacement

2006 cadillac dts alternator replacement DEFAULT

how to replace alternator

MONDAY, FEBRUARY 9, 2015 97 Deville alternator replacement I recently replaced the alternator on my daughter's 97 Sedan Deville. It was a 140 amp without the heated windshield feature. I read several posts on line about the procedure and a video that was first thing on the google search that was not helpful in the least. With that said, I had to read at least three posts to get enough info to decide to attempt the job. Therefore I decided to write a post that completely cover the steps for removal and list the tools for the job. I have a homemade ramp that I use to change the oil in the Caddy and this is what I used to raise the front high enough for me to slide under the front of the car. The ramp is made of 4 pieces of 2x8 pressure treated lumber. the bottom piece is 30" long and each other piece is 2" shorter than the other screwed together in a stair step manor thus creating the ramp to drive the front tires up on. Get the car at least 6" off the ground and be safe, set the parking brake. Get together a straight blade screwdriver, 15mm socket, 10mm socket, 8mm socket; a 15mm, a 10mm, and a 6mm open end wrench and a 1/2 drive breaker bar. There are four 15mm bolts that hold the alternator in place. But first you have to create access to reach the alternator from underneath the vehicle. Crawl under the front of the car and remove the three 10mm bolts from the black plastic access cover that is between the radiator and the cross member, remove the panel. It is approx. 5" wide and 30" long. Remove the four 10mm bolts from the small metal access panel that is directly below the alternator. After you get this panel off remove the 10mm bolt from the metal clamp on the wire loom bolted to the crossmember and tuck the wire out of the way up on the top of the crossmember. Looking up you will be able to see the two 15mm bolts on the engine side of the alternator along with the battery wire connection and the wire plug above it. Also you will see the cooling fan that you will be removing. Get back up to the top side and remove the plastic cover that goes across the top of the radiator. This can be removed by pulling the plastic push plugs out and pulling up on either end firmly to release it. Take the two long mounting screws out of the passenger side cooling fan, unplug the wiring connector, crawl back under and use the screwdriver to pry open the plastic clamp holding the wire loom to the back of the fan. From topside pull radiator hose aside to lift fan up and out. Lay fan down with blade assembly facing up. Next, You Should disconnect the battery cables and maybe cover the terminals so you don't accidently arc the socket wrench on them when removing the two mounting bolts on that side of the alternator. Locate the upper and lower mounting bolts and remove them completely. Take your 1/2" breaker bar and insert it in the square on the belt tensioner. Push the handle toward the front of the car and carefully slide the serpentine belt off of the alternator pulley. Using your right hand, reach down and hold the belt steady near the bottom of the tensioner and take the left hand and deliberately slide the belt toward the firewall side to get it slid back out of the way of the alternator. Careful not to unravel the route of the belt. Crawl back under and remove the battery wire and the wiring plug from the alternator. Use you 15mm open end wrench to remove the two mounting bolts. The lower bolt may not pull all the way out. Hold your hand under the unit for support. Gently pull the alternator down to clear the bracket. Move the alternator slightly toward the middle. Once you have a little room turn the alternator pulley side down and then twist slightly until it slips out between the radiator and the cross member. If you are deliberate, you will remove it without damaging any of the radiator cooling fins. Install new one in reverse. Took me 3 hours with the trip to the parts store included. This job a fairly easy job. A new NAPA alternator was $154.00 I paid a shop to replace one in 2008 and cost 487.00 for the job and they used a Delco Reman. Do not use a ratcheting wrench on the lower mounting bolt on the engine side. there is not enough room for the ratchet to clear the crossover pipe next to it!

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Cadillac DTS Alternator Replacement

An alternator generates electric power in a car and is a major component of the car's charging system. Replacement costs depend on the year, make, and model of the car.

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Learn more about Alternators:

RepairSmith offers upfront and competitive pricing. The average cost for Cadillac DTS Alternator Replacement is $788. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

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2007 Cadillac DTS

4.6L V8 NULL • 104,000 miles

Tracy ,  CA 95391

$671 - $820

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2009 Cadillac DTS

4.6L V8 NULL • 148,000 miles

Santa Margarita ,  CA 93453

$652 - $796

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2007 Cadillac DTS

4.6L V8 Base • 110,000 miles

Phoenix ,  AZ 85018

$702 - $858

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2006 Cadillac DTS

4.6L V8 • 132,000 miles

Surprise ,  AZ 85388

$953 - $1,165

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2007 Cadillac DTS

4.6L V8 • 140,000 miles

San Bernardino ,  CA 92411

$567 - $693

Last Updated:
Dec 15, 2020 8:45 PM

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What is an Alternator?

The alternator is responsible for two things. First, it powers the electrical units when your car is running. The radio, lights, window switches, USB ports, etc., are all powered by the alternator. And second, it recharges the car’s battery, which is the source of electricity when the car is turned off. Your car’s alternator gains power from the engine. It’s connected to the engine via a drive belt, and it converts that energy into usable electricity. It’s a pretty simple system. However, the alternator does need to be regulated, to make sure that nothing is overcharged or undercharged. In older cars, that’s the job of the voltage regulator. In newer cars, the engine control module (ECM) is responsible for those duties.

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Symptoms of a failing Alternator

Car won’t start

When your car is running, the alternator uses energy from the engine to recharge the battery. When the car is off, it needs that electricity from the battery in order to turn back on. If the car won’t turn on, it may be because the alternator isn’t recharging the battery.

Hard starting

Similarly, if the alternator isn’t charging the battery sufficiently, you’ll likely have trouble starting the car, also known as a hard start.


You might think that these issues only arise when starting the vehicle, but a malfunctioning alternator can actually result in stalling when your car is turned on.

Lights that are too bright or too dim

If the alternator is sending too much electricity to the electrical units, your car’s lights will likely be brighter than they’re supposed to be. Conversely, if the alternator isn’t sending enough electricity, then the lights will be too dim.

Whining noise

A busted alternator will often make an annoying whining noise when the engine is running.

Warning lights

A malfunctioning alternator will usually result in a warning light or two illuminating on your dashboard. The check engine warning light and a charging system warning light are most common.

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How urgent is an Alternator replacement?

Usually a faulty alternator won’t cause further damage to the vehicle. However, if it is overcharging or undercharging certain electrical units, it is possible for some damage to occur. A malfunctioning alternator does make your car less reliable, however, due to the potential issues with stalling and starting, so it’s best to get it replaced immediately if you’re starting to notice the above symptoms.

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Alternator Repair Service

How much does a Alternator Repair cost?

On average, the cost for a Cadillac DTS Alternator Repair is $862 with $501 for parts and $361 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2011 Cadillac DTSV8-4.6LService typeAlternator RepairEstimate$1484.48Shop/Dealer Price$1808.37 - $2614.64
2006 Cadillac DTSV8-4.6LService typeAlternator RepairEstimate$1563.28Shop/Dealer Price$1918.06 - $2753.59
2008 Cadillac DTSV8-4.6LService typeAlternator RepairEstimate$1563.28Shop/Dealer Price$1918.05 - $2753.56
2007 Cadillac DTSV8-4.6LService typeAlternator RepairEstimate$1563.28Shop/Dealer Price$1917.82 - $2753.16
2010 Cadillac DTSV8-4.6LService typeAlternator RepairEstimate$1373.30Shop/Dealer Price$1693.11 - $2502.41
2009 Cadillac DTSV8-4.6LService typeAlternator RepairEstimate$1373.30Shop/Dealer Price$1693.00 - $2502.22

Show example Cadillac DTS Alternator Repair prices

How does an alternator help your car run?

The alternator is the component that charges the battery in your car. When you use electrical components in your car (stereo, lights, etc.), the battery loses power. The alternator recharges the battery, replenishing the lost battery power. The alternator is located in the engine compartment. If the alternator is not working properly, your car will only stay running for as long as the battery has power stored. Once the battery loses power, your car will not start. Normally, a malfunctioning alternator will turn on the battery warning light or will have a low volt gauge reading.


Before repairing the alternator:

The mechanic should check the entire charging system before installing a new alternator, including checking battery cables for corrosion and the condition of the battery.

Steps when replacing an alternator:

  • Inspect entire charging system (battery, cables, alternator).
  • Inspect the drive belts.
  • Test alternator output.
  • Remove and replace alternator if found to be faulty.
  • Re-test alternator output.

Our recommendation for alternator replacements:

Ask your mechanic to inspect the condition of the charging system during every major service. The mechanic should also clean and tighten the battery cables during every major service.

What common symptoms indicate you may need to replace the Alternator?

  • Dead battery or battery will not hold a charge.
  • Dim lights.
  • Battery warning light is on.

Why repairing your alternator is important:

Your alternator charges your battery, which powers the electronics in your vehicle, such as the radio and the air conditioning. The battery is also needed to turn on your vehicle. A malfunctioning alternator will not charge your car’s battery, and your vehicle will eventually run out of battery life and not be able to start.

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