270 Amp G Series Alternator for Select 1994-2012 GM Vehicles
• 270A High Output Cast Aluminum Alternator
• For use with Select 1994-2012 GM Vehicles
• Heavy Duty Regulators
• Premium NTN Bearings
• Low RPM Output
• 100,000 Mile Durability
The hugely popular G series of large case 3 phase alternators have been tried and true for over 15 years. These units offer excellent low RPM output, with 100,000 mile durability. This G series unit features Mechman's custom solid copper rectifier with large 65 amp press fit diodes and over sized output stud for excellent durability. It cranks out over 165 amps at just 600 RPM engine speed on any standard GM truck, with full 270+ amps at anything above 1800 rpm engine speed! A 46mm hard anodized billet aluminum 6 rib pulley is used to maximize low RPM output, so a 1/2" to 1" shorter than stock length belt (not included) is recommended for optimum belt tension. The 270 amp G series units are made in the USA and come with a 2 year warranty.
NOTE: Some GM vehicles equipped with the heavy duty charging package and CS144 alternator will require a harness adapter in order for the OEM alternator plug to fit. Some 2005 and newer GM's have a 2 pin connection that isn't compatible with this unit. Please check your vehicle's original alternator plug and compare to the plug photo to verify proper fitment before ordering. Adapter harnesses are available (sold separately) for customers with rectangular shaped alternator plugs For customers desiring adjustable voltage, these units are compatible with the Adjustable Voltage Boost module for 1996 - 2004 GM 4 pin oval connectors.
Please use our Fitment Guide to determine specific compatibility for the submodel and audio features
Internal Product ID:
79343
mechman
the alternator was exactly what i needed it was stronger than stated it puts out 278 amps at 1800 and i think it was 169 amps at idle was much needed and also i received it quicker from sonix electronix because they had it in stop already rather than waiting 2-4 weeks
62
found this helpful.Best alt
Got it on my 99 trans am pushing a hifonics brz 2400 3pioneer12s and a D3400 batt.No voltage drop below 14.So far it's great
57
found this helpful.A must have for any basshead
I have an 02 Tahoe with a huge audio system. I had an Iraggi 320 amp and it died on me so I needed a quick replacement. Everyone knows how slow Iraggi is on his warranties. So I bought this one. I ordered it and it was here the very next day. A+ shipping and an awesome alternator! This things holds voltage well! I usually stay in the 13s at full tilt. I'm running almost 4,000 watts. Granted I do have XS power batteries and 1/0 wire. I plan to get another one of these and run a dual alternator bracket and add more subs and amps! Buy this alternator! You won't regret it!
2
found this helpful.2nd time around
Second time going thru sonic for an alternator as always great service and a strong support team..thank you
1
found this helpful.Great Product
Alternator is very powerful! My sound system is sounding much better!!
1
found this helpful.Awesome alternator
Bought this for a 2005 hummer h2 I have two 12" jlw7 with two jl 1200/1 amps just for the subs did the big four upgrade run another battery lights dim was very bad until this alternator now my volts don't move these alternators are made in USA brand new they are great don't hesitate
1
found this helpful.The best!!!!
Just one word... Power!!!!!! And a lot improve on your electric system !!! Just the best upgrade for your sound system
1
found this helpful.mechman
I would definitely recommend this altenator to any one great buy, good price, I didn't get a logo sticker though
1
found this helpful.Still pounding
I have had it for 17 months now and it's still charging my system perfect.Remember most amps say full power at 14.4 volts.With out a alternator you can't do it right so just spend the money and stop getting 3 batteries
1
found this helpful.Awsome a great pick fitted perfect
This alternator is a perfect fit and powerful output I'm very pleased with this product
1
found this helpful.Best selling similar products