On a consolidated basis, we posted record third quarter revenues of $3.1 billion, up 21% and record third quarter gross profit of $472 million, up 25%, driven by strong performance across the board and new used fixed operations in F&I.
Going beyond our top line growth, our third quarter results continue to validate our permanent expense reductions, achieving record third quarter SG&A expense as a percentage of gross profit of just 68.1%.
On a Franchised Dealerships segment basis, though, SG&A as a percentage of gross profit was just 60.1%, a 760-basis point decrease year-over-year and down from 76.9% in the third quarter of 2019.
Turning to earnings, we reported record third quarter pre-tax income from continuing operations of $112 million, up 39% year-over-year and earnings from continuing operations of $85 million or $1.96 per diluted share.
Diving deeper into our core Franchised Dealerships segment, third quarter 2021 revenues were $2.4 billion compared to $2.2 billion in the prior year, which reflects the ongoing recovery in consumer demand we've seen since the high since pandemic.
On a same-store basis, Franchised Dealerships third quarter revenues were up 11% year-over-year, while gross profit improved by 27%, driven by a record new and used vehicle gross per unit, a 21% increase in customer pay fixed operations gross profit and all-time record Franchised segment F&I gross profit per retail unit, up $2,303, up 27% from the third quarter of 2020.
Our Franchised Dealerships new vehicle inventory was approximately 2,400 units or just a 10-day supply down from nearly 13,000 new vehicles at this same time last year.
Comparatively, used vehicles inventory was in line with our target level of 27 days supplying or 8,200 units.
We reported all-time record quarterly revenues of $663 million, up 72% from the prior year and representing our fifth consecutive quarter of record EchoPark revenues.
We achieved record third quarter EchoPark retail sales volume of 21,255 units, up 41% year-over-year.
During the third quarter of 2021, EchoPark market share increased 110 basis points to approximately 4% of the one to four year-old vehicle segment in our current markets.
At the end of the quarter, EchoPark used vehicle inventory was approximately 9,800 units for a 41-day supply.
For the third quarter, we reported an EchoPark pre-tax loss of $32.9 million and adjusted EBITDA loss of $28.5 million.
This includes new market-related losses of $18 million and $16.8 million, respectively.
With our progress today, we remain confident in attaining our goals of 25% population coverage by the end of 2021 and 90% population coverage by 2025.
We recently announced several strategic acquisitions to further accelerate our growth plans In September, we signed a definitive agreement to acquire RFJ Auto Partners, a top 15 U.S. dealer group by total revenues.
With 33 locations in seven states and a portfolio of 16 automotive brands, the transaction will add six incremental states to Sonic's geographic coverage and five additional brands to our portfolio, including the highest volume, Chrysler Dodge Jeep RAM dealer in the world and Dave Smith Motors.
This acquisition, which is expected to close in December of this year, is projected to add $3.2 billion in annual revenues to the company, which are an incremental to Sonic's previous stated target of $25 billion in total revenues by 2025.
We ended the third quarter with $618 million in available liquidity, including approximately $320 million in cash and 425 was on hand.
More recently in connection with our pending acquisition of RFJ Auto, we announced a significant upside to our credit facilities, increasing total capacity to $2.95 billion and completed an oversubscribed senior note offering with an aggregate principal amount of $1.15 billion, capitalizing on the favorable market conditions and an upgraded corporate credit rating to refinance our existing debt maturities at attractive terms with lower borrowing costs.
Lastly, given our strong balance sheet, I'm pleased to report that our Board of Directors approved a quarterly cash dividend of $0.12 per share, payable on January 14, 2022, to all stockholders of record as of December 15, 2021.

Summary:
On a consolidated basis, we posted record third quarter revenues of $3.1 billion, up 21% and record third quarter gross profit of $472 million, up 25%, driven by strong performance across the board and new used fixed operations in F&I.
Turning to earnings, we reported record third quarter pre-tax income from continuing operations of $112 million, up 39% year-over-year and earnings from continuing operations of $85 million or $1.96 per diluted share.